From: Andrea Arcangeli <aarcange@redhat.com>
Date: Thu, 13 Jan 2011 23:47:11 +0000 (-0800)
Subject: thp: use compaction for all allocation orders
X-Git-Tag: v2.6.38-rc1~111
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=c5a73c3d;p=karo-tx-linux.git

thp: use compaction for all allocation orders

It makes no sense not to enable compaction for small order pages as we
don't want to end up with bad order 2 allocations and good and graceful
order 9 allocations.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/compaction.c b/mm/compaction.c
index 60d52a7298d5..6d592a021072 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -578,7 +578,7 @@ unsigned long try_to_compact_pages(struct zonelist *zonelist,
 	 * made because an assumption is made that the page allocator can satisfy
 	 * the "cheaper" orders without taking special steps
 	 */
-	if (order <= PAGE_ALLOC_COSTLY_ORDER || !may_enter_fs || !may_perform_io)
+	if (!order || !may_enter_fs || !may_perform_io)
 		return rc;
 
 	count_vm_event(COMPACTSTALL);