[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Hi Leonardo, yes that's correct. Focus was changed in the way to make sure that everything is in 19.10, to be well prepared for 20.04 - and 18.04 (GA kernel 4.15) is not targeted (nevertheless 18.04 HWE kernel incl. the patches). (All according to LP comment #66.) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
I know it's an old bug, but I just want to confirm if my understanding is correct: - You have received all the suggested patchs, via mailing list - Some of them could not be accepted - Paul Mackerras have pointed which patches can be dropped, and which are needed to fix the issue - By above comments, bionic hwe, disco and eoan already contain the patches. - The patches won't be applied in bionic Is the above correct? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu Disco) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
That was abs. correct, Rafael - thx (I just haven't had the permission to add D). ** Changed in: linux (Ubuntu Disco) Status: New => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Disco: Fix Released Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Frank, based on your previous comment I'm also flagging disco as Fix Released. Please fix this if it makes no sense (just to be accurate). Thx! ** Also affects: qemu (Ubuntu Disco) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Disco) Importance: Undecided Status: New ** No longer affects: qemu (Ubuntu Disco) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Disco: New Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
I just double-checked all the commits that are mentioned in comment #67. In between (or let's better say since quite some time) they are all in Eoan master and are also all in Disco master (and with that even in bionic's hwe kernel, despite comment #66: 'no need to target bionic'). Hence if one uses the default disco and eoan kernel today, it includes the above list of patches (#67). With that I change at least the Eoan entry to Fix Released. ** Changed in: linux (Ubuntu Eoan) Status: In Progress => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Fix Released Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Eoan: Fix Released Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Also affects: qemu (Ubuntu Eoan) Importance: Undecided Status: Invalid ** Also affects: linux (Ubuntu Eoan) Importance: Medium Status: In Progress ** Changed in: linux (Ubuntu Bionic) Status: In Progress => Won't Fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Won't Fix Status in linux source package in Cosmic: Invalid Status in linux source package in Eoan: In Progress Status in qemu source package in Eoan: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu) Status: Expired => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
These patches are still needed to solve the bug, so this bug need to be reopened. We are waiting for Paul's reply. ** Changed in: linux (Ubuntu Bionic) Status: Expired => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Expired Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Status: Incomplete => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Expired Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Expired Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
This bug has expired, marking it as invalid, please reopen if this is still a valid issue. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Expired Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Expired Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
[Expired for linux (Ubuntu) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Expired Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Expired Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
[Expired for linux (Ubuntu Bionic) because there has been no activity for 60 days.] ** Changed in: linux (Ubuntu Bionic) Status: Incomplete => Expired -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Expired Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Expired Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Leonardo, can you elaborate on the 'other possible issues'? We're hesitant to pull 18 patches into a stable kernel under the assumption that they *might* fix some *potential* issues, without clear evidence. If you can test the single-patch kernel and report back that there are still issues then that's a much stronger case for the other patches. Commit 'KVM: PPC: Book3S HV: Avoid crash from THP collapse during radix page fault' that you're asking for requires all these additional backports to apply cleanly. Which makes me wonder if we're not actually introducing a problem with these backports just to fix it again later. Not saying that's the case, just wondering... Also, the following seem to be totally unrelated and unnecessary: - KVM: PPC: Remove unused kvm_unmap_hva callback - powerpc/mm/radix: Remove unused code While looking through the patches I also noticed that the following is the second patch of a series of 11 but it's the only one from the series that you're backporting. - powerpc/kvm: Switch kvm pmd allocator to custom allocator Its commit message mentions subsequent patches of that series so I'm wondering why we need/want only this single patch?? Remember that we have to support this kernel for years and years to come so we only want to backport the absolute necessary. Lastly and FYI, the following is the minimal subset of your patches that all cherry-pick cleanly: - KVM: PPC: Book3S HV: Avoid crash from THP collapse during radix page fault - KVM: PPC: Book3S HV: Don't use compound_order to determine host mapping size - KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() - KVM: PPC: Book3S HV: radix: Refine IO region partition scope attributes - KVM: PPC: Book3S HV: Use __gfn_to_pfn_memslot() in page fault handler - KVM: PPC: Book3S HV: Handle 1GB pages in radix page fault handler - KVM: PPC: Book3S HV: Streamline setting of reference and change bits - KVM: PPC: Book3S HV: Radix page fault handler optimizations Please provide some context why we need all the above (and potentially more). -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Incomplete Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Leonardo, we're evaluating the patch series for inclusion. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Incomplete Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Leonardo, since you seem to have a reliable reproducer now, could you
give this test kernel [1] a try? It just contains commit c066fafc595e
("KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix()") and
is basically what Joe gave you (comment #5) but at that time you weren't
able to reproduce the issue.
[1] https://kernel.ubuntu.com/~juergh/lp1788098/
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https://bugs.launchpad.net/bugs/1788098
Title:
Avoid migration issues with aligned 2MB THB
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Status in qemu package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Incomplete
Status in linux source package in Cosmic:
Invalid
Bug description:
FYI: This blocks bug 1781526 - once this one here is resolved we can
go on with SRU considerations for 1781526
--- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT---
Hi, in some environments it was observed that this qemu patch to
enable THP made it more likely to hit guest migration issues, however
the following kernel patch resolves those migration issues:
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15
KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix()
Once merged upstream, it would be good to include that change as well
to avoid potential migration problems. Should I open a new bug for
that or is it better to track here?
Note Paelzer: I have not seen related migration issues myself, but it
seems reasonable and confirmed by IBM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions
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[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
In comment #22 above, it states that "In a meeting with lagarcia, I was
informed this patch is very important, and that it is already on kernel
4.18-15 onwards."
So, I assume that the required patchset(s) are already applied to the
18.04 HWE kernel, and this bug requests a backport to the bionic 4.15
kernel.
Next step is for the Canonical kernel team to analyse this backport
request, dropping the commit fb1522e099f0 ("KVM: update to new
mmu_notifier semantic v2", 2017-08-31), to assess whether it can be
SRU'ed into the bionic 4.15 kernel.
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https://bugs.launchpad.net/bugs/1788098
Title:
Avoid migration issues with aligned 2MB THB
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Status in qemu package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Incomplete
Status in linux source package in Cosmic:
Invalid
Bug description:
FYI: This blocks bug 1781526 - once this one here is resolved we can
go on with SRU considerations for 1781526
--- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT---
Hi, in some environments it was observed that this qemu patch to
enable THP made it more likely to hit guest migration issues, however
the following kernel patch resolves those migration issues:
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15
KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix()
Once merged upstream, it would be good to include that change as well
to avoid potential migration problems. Should I open a new bug for
that or is it better to track here?
Note Paelzer: I have not seen related migration issues myself, but it
seems reasonable and confirmed by IBM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions
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[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Stefan NACK'ed the series. For some unknown reason that email did make
it into the archive so here is ist content:
> Since commit fb1522e099f0 ("KVM: update to new mmu_notifier semantic
> v2", 2017-08-31), the MMU notifier code in KVM no longer calls the
> kvm_unmap_hva callback. This removes the PPC implementations of
> kvm_unmap_hva().
This is not really the way SRUs should be done. We cannot remove support for
interfaces after release. Also the amount of change as a requisite should be
kept as minimal as possible. This just feels like too many changes without a
strong argument on why this must be done that way.
-Stefan
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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1788098
Title:
Avoid migration issues with aligned 2MB THB
Status in The Ubuntu-power-systems project:
Incomplete
Status in linux package in Ubuntu:
Incomplete
Status in qemu package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Incomplete
Status in linux source package in Cosmic:
Invalid
Bug description:
FYI: This blocks bug 1781526 - once this one here is resolved we can
go on with SRU considerations for 1781526
--- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT---
Hi, in some environments it was observed that this qemu patch to
enable THP made it more likely to hit guest migration issues, however
the following kernel patch resolves those migration issues:
https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15
KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix()
Once merged upstream, it would be good to include that change as well
to avoid potential migration problems. Should I open a new bug for
that or is it better to track here?
Note Paelzer: I have not seen related migration issues myself, but it
seems reasonable and confirmed by IBM.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions
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[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Hi Leonardo, unfortunately there was an issue with the SRU request and Juerg NACK-ed it, please have a look here: https://lists.ubuntu.com/archives/kernel-team/2019-March/099128.html Please re-submit the SRU request with the requested corrections. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Incomplete Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu Bionic) Status: In Progress => Incomplete ** Changed in: linux (Ubuntu) Status: In Progress => Incomplete ** Changed in: ubuntu-power-systems Status: In Progress => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Incomplete Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Incomplete Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu Bionic) Status: Confirmed => In Progress ** Changed in: linux (Ubuntu) Status: Confirmed => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: In Progress Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Status: Confirmed => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: In Progress Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Attachment added: "patches.tar.gz" https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1788098/+attachment/5242393/+files/patches.tar.gz ** Changed in: linux (Ubuntu Bionic) Status: New => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
ProblemType: Bug AlsaDevices: total 0 crw-rw 1 root audio 116, 1 Feb 26 08:00 seq crw-rw 1 root audio 116, 33 Feb 26 08:00 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.9-0ubuntu7.5 Architecture: ppc64el ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=/dev/mapper/rhel_zzfp368h-swap IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Package: linux (not installed) PciMultimedia: ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=/dev/mapper/rhel_zzfp368h-root ro quiet splash ProcLoadAvg: 10.92 2.60 0.86 1/1347 9348 ProcLocks: 1: POSIX ADVISORY WRITE 3540 00:17:577 0 EOF 2: FLOCK ADVISORY WRITE 3320 00:17:555 0 EOF 3: POSIX ADVISORY WRITE 3628 00:17:610 0 EOF 4: POSIX ADVISORY WRITE 1743 00:17:351 0 EOF 5: FLOCK ADVISORY WRITE 3621 00:17:605 0 EOF ProcSwaps: Filename TypeSizeUsedPriority /dev/dm-1 partition 166460800 -2 ProcVersion: Linux version 4.15.0-45-generic (buildd@bos02-ppc64el-005) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #48-Ubuntu SMP Tue Jan 29 16:27:02 UTC 2019 ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-45-generic N/A linux-backports-modules-4.15.0-45-generic N/A linux-firmware 1.173.3 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' Tags: bionic Uname: Linux 4.15.0-45-generic ppc64le UnreportableReason: This report is about a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: VarLogDump_list: total 36888 -r--r- 1 root root 9520107 Feb 25 15:11 FSPDUMP.13C63FW.0A0F.20190225210916 -r--r- 1 root root 9556523 Feb 25 15:11 FSPDUMP.13C63FW.1A0F.20190225211018 -r--r- 1 root root 9642286 Feb 26 08:00 FSPDUMP.13C63FW.2A0F.20190226135913 -r--r- 1 root root 9041963 Feb 25 15:11 FSPDUMP.13C63FW.7A0E.20190225203903 _MarkForUpload: False cpu_cores: Number of cores present = 40 cpu_coreson: Number of cores online = 40 cpu_dscr: DSCR is 16 cpu_freq: min: 3.499 GHz (cpu 159) max: 3.500 GHz (cpu 2) avg: 3.499 GHz cpu_runmode: Could not retrieve current diagnostics mode, No kernel interface to firmware cpu_smt: SMT=4 ** Tags added: apport-collected bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
...or perhaps I've misunderstood. Are the patches listed in comment #23 the complete set required to resolve the issue (with no complex backporting required)? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
In comment #22, you mentioned working on a backport of these patches to the Ubuntu 4.15 kernel. Was this successful? Is it possible to attach the backported patchsets to this bug? ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed ** Changed in: ubuntu-power-systems Assignee: bugproxy (bugproxy) => Canonical Kernel Team (canonical-kernel-team) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu Bionic) Status: Invalid => New ** Changed in: linux (Ubuntu) Status: Invalid => New ** Changed in: ubuntu-power-systems Status: Invalid => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Confirmed Status in linux package in Ubuntu: New Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Thanks for all your effort Leonardo, that seems to make the bug valid again, but I'll leave that to JFH/Manoj to resurrect it and make it a proper kernel bug as it seems there now is a way to test it (at least you can do so) and a set of patches. I can not speak for the ack/nack of those back-ports but that the kernel Team will do then. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu) Assignee: Joseph Salisbury (jsalisbury) => (unassigned) ** Changed in: linux (Ubuntu Bionic) Assignee: Joseph Salisbury (jsalisbury) => (unassigned) ** Changed in: linux (Ubuntu Cosmic) Assignee: Joseph Salisbury (jsalisbury) => (unassigned) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Thanks for your continuous efforts on this Leonardo, I have no further suggestion. I think to stay on the safe side we will keep everything as-is for now. I'd say it is IBMs call to decide between this now: a) Speed: Call 1781526 unblocked by the evaluation here. We'd re-consider SRUing that bug then based on your call this won't cause issues on ppc64el. b) Safety: since it was only a minor performance improvement but has the potential hidden breakage associated we keep 1781526 in Won't Fix -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Status: Incomplete => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Invalid Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Hi Leonardo, thanks for your efforts trying to verify that. Given that you couldn't trigger it I wonder what to do. Currently it is incomplete waiting for such a test, but as it seems to elude you I'd suggest we call the bug invalid until we would know otherwise. For the related bug 1781526 I would think it faces a similar destiny. There also the test/verification kind of left us with Jhopper. It was said that this bug here might occur more often if 1781526 would be applied. While we couldn't trigger the bug here, I'm reluctant to push a nice but minor performance fix while we know it might trigger more crashes. Therefore I'll set BOTH bugs to invalid and would ask the kernel Team to stop working on this one here until one can provide a working trigger ** Changed in: linux (Ubuntu Cosmic) Status: In Progress => Invalid ** Changed in: linux (Ubuntu Bionic) Status: In Progress => Invalid ** Changed in: linux (Ubuntu) Status: In Progress => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Invalid Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Invalid Status in linux source package in Cosmic: Invalid Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu) Importance: Critical => Medium ** Changed in: linux (Ubuntu Bionic) Importance: Critical => Medium ** Changed in: linux (Ubuntu Cosmic) Importance: Critical => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
After discussions with IBM, reducing the priority. ** Changed in: ubuntu-power-systems Importance: Critical => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Tags removed: triage-a ** Tags added: triage-r -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Nothing yet happened here. I also declared the related qemu fix that is blocked by this as incomplete. @manoj/jfh - maybe time for triage-r here? -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Marking as incomplete while awaiting the IBM testing assistance described in comment #6. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Status: In Progress => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Tags removed: triage-g ** Tags added: triage-a -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: In Progress Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Status: New => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: In Progress Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Tags removed: targetmilestone-inin--- ** Tags added: targetmilestone-inin1804 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
--- Comment From jhop...@us.ibm.com 2018-08-30 10:29 EDT--- Thanks, I've asked for some testing assistance from our KVM team but will note here some of the details from the original report of this problem.. repro steps are just a simple local host migration. ..they later noted that increasing the speed was a workaround: (qemu) migrate_set_speed 1G so you would want to test w/ default speed to confirm the issue is resolved (qemu) migrate -d tcp:localhost: using " cosmic qemu version 1:2.12+dfsg-3 " from Bug 169712 / LP 1781526 (which enables qemu to use 2MB THP backing for powerpc), plus the test kernel build from this bug. Note without the kernel fix discussed in this bug, a migration problem might still happen even without that qemu THP patch if you got lucky enough to have a 2MB alignment by chance. ** Tags added: architecture-ppc64le bugnameltc-170805 severity-critical targetmilestone-inin--- -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
I built a test kernel with the following patch: KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() The test kernel can be downloaded from: http://kernel.ubuntu.com/~jsalisbury/lp1788098 Can you test this kernel and see if it resolves this bug? Note about installing test kernels: • If the test kernel is prior to 4.15(Bionic) you need to install the linux-image and linux-image-extra .deb packages. • If the test kernel is 4.15(Bionic) or newer, you need to install the linux-modules, linux-modules-extra and linux-image-unsigned .deb packages. Thanks in advance! -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: linux (Ubuntu Bionic) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu Cosmic) Assignee: (unassigned) => Joseph Salisbury (jsalisbury) ** Changed in: linux (Ubuntu Bionic) Importance: Medium => Critical ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => In Progress ** Changed in: linux (Ubuntu Cosmic) Status: Confirmed => In Progress -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: In Progress Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Status in linux source package in Cosmic: In Progress Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Changed in: ubuntu-power-systems Assignee: Canonical Kernel Team (canonical-kernel-team) => bugproxy (bugproxy) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Description changed: + FYI: This blocks bug 1781526 - once this one here is resolved we can go + on with SRU considerations for 1781526 + --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- - Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: + + Hi, in some environments it was observed that this qemu patch to enable + THP made it more likely to hit guest migration issues, however the + following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: FYI: This blocks bug 1781526 - once this one here is resolved we can go on with SRU considerations for 1781526 --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
** Also affects: qemu Importance: Undecided Status: New ** No longer affects: qemu ** Also affects: ubuntu-power-systems Importance: Undecided Status: New ** Changed in: ubuntu-power-systems Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team) ** Changed in: ubuntu-power-systems Importance: Undecided => Critical ** Tags added: triage-g -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in The Ubuntu-power-systems project: New Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
For this particular case the log files are not needed and/or applicable. After discussing in #stable-kernel I set it to confirmed. ** Changed in: linux (Ubuntu Bionic) Status: New => Confirmed ** Changed in: linux (Ubuntu Cosmic) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
FYI: this is essentially an IBM request, reverse mirroring will happen at some point, but I wanted to make you aware right now -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in linux package in Ubuntu: Confirmed Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: Confirmed Status in linux source package in Cosmic: Confirmed Bug description: --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
[Kernel-packages] [Bug 1788098] Re: Avoid migration issues with aligned 2MB THB
Oh, I just realized while initially reported against qemu in bug 1781526 that this is a kernel, and not a qemu patch. That spreads the timeline a bit: - this should be in Cosmic before Release to avoid issues due to the fix of 1781526. - since that is kind of short I'll bump priority there. - This has to be in Bionic before a fix for bug 1781526 (I'll wait with a qemu change until this one is complete) I'm marking the qemu task invalid (no action there other than to track the Bionic release of this which will finally unblock the SRU of bug 1781526 to Bionic). I'm adding a kernel task to reflect that this is a kernel change that is needed. Finally I'm adding a Cosmic and Bionic Task. ** Also affects: linux (Ubuntu) Importance: Undecided Status: New ** Changed in: qemu (Ubuntu) Status: New => Invalid ** Also affects: qemu (Ubuntu Cosmic) Importance: Undecided Status: Invalid ** Also affects: linux (Ubuntu Cosmic) Importance: Undecided Status: New ** Also affects: qemu (Ubuntu Bionic) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Bionic) Importance: Undecided Status: New ** No longer affects: qemu (Ubuntu Bionic) ** No longer affects: qemu (Ubuntu Cosmic) ** Changed in: linux (Ubuntu Cosmic) Importance: Undecided => Critical ** Changed in: linux (Ubuntu Bionic) Importance: Undecided => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1788098 Title: Avoid migration issues with aligned 2MB THB Status in linux package in Ubuntu: New Status in qemu package in Ubuntu: Invalid Status in linux source package in Bionic: New Status in linux source package in Cosmic: New Bug description: --- Comment From jhop...@us.ibm.com 2018-08-20 17:12 EDT--- Hi, in some environments it was observed that this qemu patch to enable THP made it more likely to hit guest migration issues, however the following kernel patch resolves those migration issues: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 KVM: PPC: Book3S HV: Use correct pagesize in kvm_unmap_radix() Once merged upstream, it would be good to include that change as well to avoid potential migration problems. Should I open a new bug for that or is it better to track here? Note Paelzer: I have not seen related migration issues myself, but it seems reasonable and confirmed by IBM. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788098/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
