Re: [PATCH] mm/migrate: don't move memcg NR_FILE_PAGES for swapcache

[David Hildenbrand]

On Wed, 04 Nov 2026 12:43:12 +0800, Song Hu wrote:
> NR_FILE_PAGES lives on both the node and the memcg plane for page
> cache folios: filemap_add_folio() and filemap_unaccount_folio() charge
> it to the folio's node and memcg, while __swap_cache_add_folio() and
> __swap_cache_del_folio() maintain the node plane of NR_FILE_PAGES and
> the memcg plane of NR_SWAPCACHE.  A folio in the swap cache therefore
> carries no per-memcg NR_FILE_PAGES count: shmem folios drop their
> memcg file accounting when swapped out, and anon folios never had any.
> 
> [...]

Applied, thanks!

tree: mm/core.git
branch: migrate-7.5.misc

Applied patches will appear soon in mm-next, followed by linux-next.

Please report any outstanding bugs that were missed during review, so we
can either drop the patch series or decide how to fix it up.

It is encouraged to provide Acked-bys, Reviewed-bys, and Tested-bys even
though the patches have already been applied. If possible, patch trailers
will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. Further, this is not a guarantee that the
patches will go upstream. If in doubt, please check the listed branch.

[1/1] mm/migrate: don't move memcg NR_FILE_PAGES for swapcache
      https://git.kernel.org/mm/core/c/ecf439e4

-- 
Cheers,

David