Commit 16fb9512 authored by Shaohua Li's avatar Shaohua Li Committed by Linus Torvalds

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: default avatarShaohua Li <>
Acked-by: default avatarMel Gorman <>
Reviewed-by: default avatarMinchan Kim <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 49ea7eb6
......@@ -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;
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