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authorHugh Dickins <hughd@google.com>2022-08-10 22:06:33 -0700
committerAndrew Morton <akpm@linux-foundation.org>2022-08-20 15:17:45 -0700
commit76d36dea02691a8ffa8cd7368eecbf727b8a1c0c (patch)
treedec5291667487401c33c1042c58eae90055c8feb /mm
parent15f242bb65b89d5f1ff990668a586fdf1307b2c8 (diff)
mm/shmem: shmem_replace_page() remember NR_SHMEM
Elsewhere, NR_SHMEM is updated at the same time as shmem NR_FILE_PAGES; but shmem_replace_page() was forgetting to do that - so NR_SHMEM stats could grow too big or too small, in those unusual cases when it's used. Link: https://lkml.kernel.org/r/cec7c09d-5874-e160-ada6-6e10ee48784@google.com Signed-off-by: Hugh Dickins <hughd@google.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: "Darrick J. Wong" <djwong@kernel.org> Cc: Radoslaw Burny <rburny@google.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/shmem.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/shmem.c b/mm/shmem.c
index ce2090744c5e..d075dd2dcc48 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1659,7 +1659,9 @@ static int shmem_replace_page(struct page **pagep, gfp_t gfp,
new = page_folio(newpage);
mem_cgroup_migrate(old, new);
__inc_lruvec_page_state(newpage, NR_FILE_PAGES);
+ __inc_lruvec_page_state(newpage, NR_SHMEM);
__dec_lruvec_page_state(oldpage, NR_FILE_PAGES);
+ __dec_lruvec_page_state(oldpage, NR_SHMEM);
}
xa_unlock_irq(&swap_mapping->i_pages);