Commit 16fb9512 authored Oct 31, 2011 by Shaohua Li Committed by Linus Torvalds Oct 31, 2011

vmscan: count pages into balanced for zone with good watermark



It's possible a zone watermark is ok when entering the balance_pgdat()
loop, while the zone is within the requested classzone_idx.  Count pages
from this zone into `balanced'.  In this way, we can skip shrinking zones
too much for high order allocation.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 49ea7eb6

mm/vmscan.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -2748,6 +2748,8 @@ static unsigned long balance_pgdat(pg_data_t *pgdat, int order,

		/* If balanced, clear the congested flag */
		zone_clear_flag(zone, ZONE_CONGESTED);
		if (i <= *classzone_idx)
		balanced += zone->present_pages;
		}
		}