lkml.org 
[lkml]   [2013]   [Jun]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH] mm: Add unlikely for current_order test
From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>

Since we have an unlikely for the "current_order >= pageblock_order / 2"
test above, adding an unlikely for this "current_order >= pageblock_order"
test seems more appropriate.

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
---
mm/page_alloc.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c3edb62..1b6d7de 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1071,7 +1071,7 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype)
rmv_page_order(page);

/* Take ownership for orders >= pageblock_order */
- if (current_order >= pageblock_order &&
+ if (unlikely(current_order >= pageblock_order) &&
!is_migrate_cma(migratetype))
change_pageblock_range(page, current_order,
start_migratetype);
--
1.7.1

\
 
 \ /
  Last update: 2013-06-15 13:41    [W:0.146 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site