mm/page_alloc: simplify how many pages are selected per pcp list during bulk free

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free_pcppages_bulk() selects pages to free by round-robining between
lists.  Originally this was to evenly shrink pages by migratetype but
uneven freeing is inevitable due to high pages.  Simplify list selection
by starting with a list that definitely has pages on it in
free_unref_page_commit() and for drain, it does not matter where
draining starts as all pages are removed.

Link: https://lkml.kernel.org/r/20220217002227.5739-4-mgorman@techsingularity.net
Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Tested-by: Aaron Lu <aaron.lu@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Michal Hocko <mhocko@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Mel Gorman 2022-03-22 14:43:36 -07:00 • committed by Linus Torvalds

parent 35b6d770e6

commit fd56eef258

1 changed files with 11 additions and 23 deletions

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mm/page_alloc.c

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