Re: [PATCH stable-5.10] mm/memory-failure: fix an incorrect use of tail pages

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On Mon, Mar 25, 2024 at 03:57:06AM +0000, Matthew Wilcox wrote:
> On Mon, Mar 25, 2024 at 11:36:49AM +0800, Liu Shixin wrote:
> > Hi,
> > 
> > After backport commit c79c5a0a00a9 ("mm/memory-failure: check the mapcount of the precise page"),
> > 
> > I got an error message as written on the patch. The problem can be fixed by the patch or just revert.
> > 
> > Now I prefer to revert because I think it is related to folio and no impact in stable, or maybe I'm wrong.
> 
> I checked out what is going wrong here, and Liu Shixin is correct.
> 
> Commit c79c5a0a00a9 was incorrectly backported to v5.10 and
> commit 70168fdc743b changees the page passed to try_to_unmap().
> It now passes the tail page, and should always have passed hpage.
> Please apply the patch below to v5.10 (and any other trees that
> c79c5a0a00a9 got backported to).

All now queued up,t hanks.

greg k-h




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