Re: [PATCH 0/1] soft_dirty: fix soft_dirty during THP split

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On Fri, Aug 19, 2016 at 04:52:51PM +0300, Pavel Emelyanov wrote:
> On 08/19/2016 04:43 PM, Andrea Arcangeli wrote:
> > On Fri, Aug 19, 2016 at 04:20:22PM +0300, Pavel Emelyanov wrote:
> >> And (!) after non-cooperative patches are functional too.
> > 
> > I merged your non-cooperative patches in my tree although there's no
> > testcase to exercise them yet.
> 
> Hm... Are you talking about some in-kernel test, or just any? We have
> tests in CRIU tree for UFFD (not sure we've wired up the non-cooperative
> part though).

Well, CRIU is by definition non-cooperative :)
Still, we don't have fork() and other events in CRIU lazy restore yet.
I have some brute force additions to the selftests/vm/userfaultfd.c that
verify that the events work, and I'm trying now to get a clean version.

BTW, with addition of hugetlbfs and tmpfs support to userfaultfd, we'd need
MADV_REMOVE and fallocate(PUNCH_HOLE) events in addition to
MADV_DONTNEED...
 
> > 
> > Thanks,
> > Andrea
> > .
> > 
> 
> -- Pavel
> 
--
Sincerely yours,
Mike.

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