Drain per-cpu lists when high-order allocations fail

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Per-cpu pages can accidentally cause fragmentation because they are free, but
pinned pages in an otherwise contiguous block.  When this patch is applied,
the per-cpu caches are drained after the direct-reclaim is entered if the
requested order is greater than 0.  It simply reuses the code used by suspend
and hotplug.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

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Mel Gorman 2007-10-16 01:25:50 -07:00 • committed by Linus Torvalds

parent b92a6edd4b

commit e2c55dc87f

1 changed files with 27 additions and 1 deletions

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mm/page_alloc.c

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