Re: [PATCH v2] mm/migrate: fix shmem xarray update during migration

[Greg KH]

On Mon, Mar 03, 2025 at 09:03:04PM -0500, Zi Yan wrote:
> On 28 Feb 2025, at 12:49, Zi Yan wrote:
> 
> > Pagecache uses multi-index entries for large folio, so does shmem. Only
> > swap cache still stores multiple entries for a single large folio.
> > Commit fc346d0a70a1 ("mm: migrate high-order folios in swap cache correctly")
> > fixed swap cache but got shmem wrong by storing multiple entries for
> > a large shmem folio. Fix it by storing a single entry for a shmem
> > folio.
> >
> > Fixes: fc346d0a70a1 ("mm: migrate high-order folios in swap cache correctly")
> > Reported-by: Liu Shixin <liushixin2@xxxxxxxxxx>
> > Closes: https://lore.kernel.org/all/28546fb4-5210-bf75-16d6-43e1f8646080@xxxxxxxxxx/
> > Signed-off-by: Zi Yan <ziy@xxxxxxxxxx>
> > Reviewed-by: Shivank Garg <shivankg@xxxxxxx>
> 
> +Cc:stable
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>