Messages in this thread Patch in this message | | | From | Chen Feng <> | Subject | [PATCH] mm: compact: remove watermark check at compact suitable | Date | Mon, 23 May 2016 11:20:17 +0800 |
| |
There are two paths calling this function. For direct compact, there is no need to check the zone watermark here. For kswapd wakeup kcompactd, since there is a reclaim before this. It makes sense to do compact even the watermark is ok at this time.
Signed-off-by: Chen Feng <puck.chen@hisilicon.com> --- mm/compaction.c | 7 ------- 1 file changed, 7 deletions(-)
diff --git a/mm/compaction.c b/mm/compaction.c index 8fa2540..cb322df 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -1260,13 +1260,6 @@ static unsigned long __compaction_suitable(struct zone *zone, int order, return COMPACT_CONTINUE; watermark = low_wmark_pages(zone); - /* - * If watermarks for high-order allocation are already met, there - * should be no need for compaction at all. - */ - if (zone_watermark_ok(zone, order, watermark, classzone_idx, - alloc_flags)) - return COMPACT_PARTIAL; /* * Watermarks for order-0 must be met for compaction. Note the 2UL. -- 1.9.1
| |