------- Comment From leona...@ibm.com 2019-04-10 12:08 EDT-------
(In reply to comment #68)
> 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.I may be wrong, but the patch to be dropped is "KVM: PPC: Remove unused kvm_unmap_hva callback" (7fe24f427a09). On this commit, it says it's removing code that is dead since commit fb1522e099f0. -- 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
