------- Comment From leona...@ibm.com 2019-02-08 14:05 EDT------- In a meeting with lagarcia, I was informed this patch is very important, and that it is already on kernel 4.18-15 onwards.
In fact, including this one. there are two important patches on this subject: https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next&id=c066fafc595eef5ae3c83ae3a8305956b8c3ef15 https://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc.git/commit/?h=kvm-ppc-next&id=6579804c431712d56956a63b1a01509441cc6800 As I said before, for 18.10 onwards (kernel >= 4.18), the patch is available from kernel upstream source, but for Ubuntu 18.04 they may not be so easily applied. So I will work on backporting them to v4.15. -- 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&id=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 : firstname.lastname@example.org Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp