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| author | Hugh Dickins <hughd@google.com> | 2024-12-04 22:50:06 -0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-12-18 19:04:42 -0800 |
| commit | dad2dc9c92e0f93f33cebcb0595b8daa3d57473f (patch) | |
| tree | 77caa0b70d498d1a13b936257195aafb98d97e40 /mm/mm_slot.h | |
| parent | 7782e3b3b004e8cb94a88621a22cc3c2f33e5b90 (diff) | |
| download | lwn-dad2dc9c92e0f93f33cebcb0595b8daa3d57473f.tar.gz lwn-dad2dc9c92e0f93f33cebcb0595b8daa3d57473f.zip | |
mm: shmem: fix ShmemHugePages at swapout
/proc/meminfo ShmemHugePages has been showing overlarge amounts (more than
Shmem) after swapping out THPs: we forgot to update NR_SHMEM_THPS.
Add shmem_update_stats(), to avoid repetition, and risk of making that
mistake again: the call from shmem_delete_from_page_cache() is the bugfix;
the call from shmem_replace_folio() is reassuring, but not really a bugfix
(replace corrects misplaced swapin readahead, but huge swapin readahead
would be a mistake).
Link: https://lkml.kernel.org/r/5ba477c8-a569-70b5-923e-09ab221af45b@google.com
Fixes: 809bc86517cc ("mm: shmem: support large folio swap out")
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Shakeel Butt <shakeel.butt@linux.dev>
Reviewed-by: Yosry Ahmed <yosryahmed@google.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Tested-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/mm_slot.h')
0 files changed, 0 insertions, 0 deletions