Re: [PATCH v4 00/33] Per-VMA locks

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On Tue, Jul 11, 2023 at 09:35:13AM -0700, Suren Baghdasaryan wrote:
> On Tue, Jul 11, 2023 at 4:09 AM Leon Romanovsky <leon@xxxxxxxxxx> wrote:
> >
> > On Tue, Jul 11, 2023 at 02:01:41PM +0300, Leon Romanovsky wrote:
> > > On Tue, Jul 11, 2023 at 12:39:34PM +0200, Vlastimil Babka wrote:
> > > > On 7/11/23 12:35, Leon Romanovsky wrote:
> > > > >
> > > > > On Mon, Feb 27, 2023 at 09:35:59AM -0800, Suren Baghdasaryan wrote:
> > > > >
> > > > > <...>
> > > > >
> > > > >> Laurent Dufour (1):
> > > > >>   powerc/mm: try VMA lock-based page fault handling first
> > > > >
> > > > > Hi,
> > > > >
> > > > > This series and specifically the commit above broke docker over PPC.
> > > > > It causes to docker service stuck while trying to activate. Revert of
> > > > > this commit allows us to use docker again.
> > > >
> > > > Hi,
> > > >
> > > > there have been follow-up fixes, that are part of 6.4.3 stable (also
> > > > 6.5-rc1) Does that version work for you?
> > >
> > > I'll recheck it again on clean system, but for the record:
> > > 1. We are running 6.5-rc1 kernels.
> > > 2. PPC doesn't compile for us on -rc1 without this fix.
> > > https://lore.kernel.org/all/20230629124500.1.I55e2f4e7903d686c4484cb23c033c6a9e1a9d4c4@changeid/
> >
> > Ohh, I see it in -rc1, let's recheck.
> 
> Hi Leon,
> Please let us know how it goes.

Once, we rebuilt clean -rc1, docker worked for us.
Sorry for the noise.

> 
> >
> > > 3. I didn't see anything relevant -rc1 with "git log arch/powerpc/mm/fault.c".
> 
> The fixes Vlastimil was referring to are not in the fault.c, they are
> in the main mm and fork code. More specifically, check for these
> patches to exist in the branch you are testing:
> 
> mm: lock newly mapped VMA with corrected ordering
> fork: lock VMAs of the parent process when forking
> mm: lock newly mapped VMA which can be modified after it becomes visible
> mm: lock a vma before stack expansion

Thanks

> 
> Thanks,
> Suren.
> 
> > >
> > > Do you have in mind anything specific to check?
> > >
> > > Thanks
> > >
> >
> > --
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> >




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