Re: [PATCH 00/10] mm/hugetlb: Make huge_pte_offset() thread-safe for pmd unshare

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On Tue, 29 Nov 2022 16:19:52 -0500 Peter Xu <peterx@xxxxxxxxxx> wrote:

> On Tue, Nov 29, 2022 at 12:49:44PM -0800, Andrew Morton wrote:
> > On Tue, 29 Nov 2022 14:35:16 -0500 Peter Xu <peterx@xxxxxxxxxx> wrote:
> > 
> > > Based on latest mm-unstable (9ed079378408).
> > > 
> > > This can be seen as a follow-up series to Mike's recent hugetlb vma lock
> > > series for pmd unsharing, but majorly covering safe use of huge_pte_offset.
> > 
> > We're at -rc7 (a -rc8 appears probable this time) and I'm looking to
> > settle down and stabilize things...
> 
> I targeted this series for the next release not current, because there's no
> known report for it per my knowledge.
> 
> The reproducer needs explicit kernel delays to trigger as mentioned in the
> cover letter.  So far I didn't try to reproduce with a generic kernel yet
> but just to verify the existance of the problem.

OK, thanks, I missed that.

I'll give the series a run in -next for a couple of days then I'll pull
it out until after the next Linus merge window, so it can't invalidate
testing heading into that merge window.




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