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mm: do not update memcg stats for NR_{FILE/SHMEM}_PMDMAPPED
Previously, all NR_VM_EVENT_ITEMS stats were maintained per-memcg, although some of those fields are not exposed anywhere. Commit 14e0f6c ("memcg: reduce memory for the lruvec and memcg stats") changed this such that we only maintain the stats we actually expose per-memcg via a translation table. Additionally, commit 514462b ("memcg: warn for unexpected events and stats") added a warning if a per-memcg stat update is attempted for a stat that is not in the translation table. The warning started firing for the NR_{FILE/SHMEM}_PMDMAPPED stat updates in the rmap code. These stats are not maintained per-memcg, and hence are not in the translation table. Do not use __lruvec_stat_mod_folio() when updating NR_FILE_PMDMAPPED and NR_SHMEM_PMDMAPPED. Use __mod_node_page_state() instead, which updates the global per-node stats only. Link: https://lkml.kernel.org/r/[email protected] Fixes: 514462b ("memcg: warn for unexpected events and stats") Signed-off-by: Yosry Ahmed <[email protected]> Reported-by: [email protected] Closes: https://lore.kernel.org/lkml/[email protected] Acked-by: Shakeel Butt <[email protected]> Acked-by: David Hildenbrand <[email protected]> Reviewed-by: Roman Gushchin <[email protected]> Cc: Johannes Weiner <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Muchun Song <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
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