[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
** Tags removed: kernel-key -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
I'm not even remotely sure about things here, so some raw notes:
* Current bisect effort ("oh man, this will take forever"):
# bad: [69973b830859bc6529a7a0468ba0d80ee5117826] Linux 4.9
# good: [c8d2bc9bc39ebea8437fd974fdbc21847bb897a3] Linux 4.8
git bisect start 'v4.9' 'v4.8'
# good: [a5af7e1fc69a46f29b977fd4b570e0ac414c2338] rxrpc: Fix loss of PING
RESPONSE ACK production due to PING ACKs
git bisect good a5af7e1fc69a46f29b977fd4b570e0ac414c2338
# bad: [a379f71a30dddbd2e7393624e455ce53c87965d1] Merge branch 'akpm' (patches
from Andrew)
git bisect bad a379f71a30dddbd2e7393624e455ce53c87965d1
* Found ppc_tm=off, tried it on 4.15.0 generic, works!
* Might be a duplicate of
https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1664622 - might be a
qemu issue
* 4.15.0 does work on scalingstack bos02 POWER8 KVM xenial xenial hosts
(-machine pseries-xenial,accel=kvm,usb=off -cpu host), but I figured
that had already been tested and would have been noticed by now. (If I
hadn't mentioned before, the host running the ppc64el fullvirt VM at
home is a xenial host.)
* See also http://lists.gnu.org/archive/html/qemu-
ppc/2018-01/msg00021.html - might be mitigated with pseries-2.12 with a
bionic host qemu setup, but I don't have an easy way to test with a
bionic host + qemu at the moment.
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Title:
[regression] bionic 4.15.0-13-generic panics on qemu ppc64el
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[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
4.8.0 works, 4.9.0 panics. I'll see about bisecting. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
I can test earlier mainlines, but keep in mind that ppc64el is very slow on my home qemu setup (note "only" "very slow"; ppc64 is "amazingly slow", presumably due to endian swapping). Does Kernel have a POWER8 playground machine, if it comes to bisect compiling? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
We should probably also report this upstream, since it still affects current mainline. https://wiki.ubuntu.com/Bugs/Upstream/kernel We can also perform a kernel bisect to identify the commit that introduced this bug. We would first need to identify the last kernel version that did not have the bug and the first version that did. Can you test the following kernels: v4.6 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-yakkety/ v4.8 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.8/ v4.10 Final: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10/ You don't have to test every kernel, just up until the kernel that first has this bug. Thanks in advance! ** Changed in: linux (Ubuntu) Importance: Undecided => High ** Tags added: kernel-da-key ** Also affects: linux (Ubuntu Bionic) Importance: High Status: Confirmed ** Also affects: linux (Ubuntu Artful) Importance: Undecided Status: New ** Changed in: linux (Ubuntu Artful) Importance: Undecided => High ** Changed in: linux (Ubuntu Artful) Status: New => Triaged ** Changed in: linux (Ubuntu Bionic) Status: Confirmed => Triaged ** Tags added: kernel-key ** Tags added: performing-bisect -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
Same result with 4.16.0-041600-generic and 4.13.0-38-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
** Attachment added: "Kernel boot log for 4.15.0-13-generic" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+attachment/5103357/+files/1761626-4.15.0-13-generic.boot.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1761626] Re: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el
** Attachment added: "libvirt XML file for instance" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+attachment/5103368/+files/1761626-libvirt.xml -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1761626 Title: [regression] bionic 4.15.0-13-generic panics on qemu ppc64el To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1761626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
