Messages in this thread | | | Date | Tue, 3 Apr 2018 16:45:22 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] mm/migrate: properly preserve write attribute in special migrate entry |
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On Tue, 3 Apr 2018 19:03:36 -0400 Jerome Glisse <jglisse@redhat.com> wrote:
> > That sounds a bit serious. Was a -stable backport considered? > > Like discuss previously with Michal, for lack of upstream user yet > (and PowerPC users of this code are not upstream either yet AFAIK). > > Once i get HMM inside nouveau upstream, i will evaluate if people > wants all fixes to be back ported to stable. > > Finaly this one isn't too bad, it just burn CPU cycles by forcing > CPU to take a second fault on write access ie double fault the same > address. There is no corruption or incorrect states (it behave as > a COWed page from a fork with a mapcount of 1).
OK, I updated the changelog with this info.
> Do you still want me to be more aggressive with stable backport ? > I don't mind either way. I expect to get HMM nouveau upstream over > next couple release cycle.
I guess that doing a single, better-organized cherrypick at a suitable time in the future is a good approach. You might want to discuss this plan with Greg before committing too far.
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