------- Comment From leona...@ibm.com 2019-04-29 18:50 EDT-------
(In reply to comment #70)
> 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/Hello Juerg, As you pointed, this kernel has only one of the 19 patches of the patch series. IMHO it would't be very productive to test this kernel as is. It can as well work just fine, but it doesn't have the complete solution to this problems. The kernel with the whole patch series is already tested, and solves many other possible issues. But If you think it's really important to test this one, I will try to schedule it for testing ASAP. -- 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&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 : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
