mm: page_alloc: batch vmstat updates in expand()

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expand() currently updates vmstat for every subpage.  This is unnecessary,
since they're all of the same zone and migratetype.

Count added pages locally, then do a single vmstat update.

Link: https://lkml.kernel.org/r/20240327190111.GC7597@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Suggested-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

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Johannes Weiner 2024-03-27 15:01:11 -04:00 • committed by Andrew Morton

parent e1f42a577f

commit 883dd161e9

1 changed files with 4 additions and 1 deletions

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mm/page_alloc.c

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