Re: [PATCH 6.0 19/20] mm/huge_memory: do not clobber swp_entry_t during THP split

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On Tue, 25 Oct 2022, Greg Kroah-Hartman wrote:
> On Tue, Oct 25, 2022 at 08:11:44AM -0700, Hugh Dickins wrote:
> > On Mon, 24 Oct 2022, Greg Kroah-Hartman wrote:
> > > From: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
> > > 
> > > commit 71e2d666ef85d51834d658830f823560c402b8b6 upstream.
> > >...
> > 
> > Greg, this patch from Mel is important,
> > but introduces a warning which is giving Tvrtko trouble - see linux-mm
> > https://lore.kernel.org/linux-mm/1596edbb-02ad-6bdf-51b8-15c2d2e08b76@xxxxxxxxxxxxxxx/
> > 
> > We already have the fix for the warning, it's making its way through the
> > system, and is marked for stable, but it has not reached Linus's tree yet.
> > 
> > Please drop this 19/20 from 6.0.4, then I'll reply to this to let you know
> > when the fix does reach Linus's tree - hopefully the two can go together
> > in the next 6.0-stable.
> > 
> > I apologize for not writing yesterday: gmail had gathered together
> > different threads with the same subject, I thought you and stable
> > were Cc'ed on the linux-mm mail and you would immediately drop it
> > yourself, but in fact you were not on that thread at all.
> 
> No worries, now dropped, thanks.

Thanks Greg.  Linus's tree now contains my fix
5aae9265ee1a ("mm: prep_compound_tail() clear page->private")
to Mel's fix
71e2d666ef85 ("mm/huge_memory: do not clobber swp_entry_t during THP split")
so they can now go on together into 6.0 stable.

They would also have been good in 5.19 stable: but too late now, it's EOL.

Hugh



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