lkml.org 
[lkml]   [2013]   [Aug]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 05/20] mm, hugetlb: grab a page_table_lock after page_cache_release
Date
We don't need to grab a page_table_lock when we try to release a page.
So, defer to grab a page_table_lock.

Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c017c52..6c8eec2 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2627,10 +2627,11 @@ retry_avoidcopy:
}
spin_unlock(&mm->page_table_lock);
mmu_notifier_invalidate_range_end(mm, mmun_start, mmun_end);
- /* Caller expects lock to be held */
- spin_lock(&mm->page_table_lock);
page_cache_release(new_page);
page_cache_release(old_page);
+
+ /* Caller expects lock to be held */
+ spin_lock(&mm->page_table_lock);
return 0;
}

--
1.7.9.5


\
 
 \ /
  Last update: 2013-08-09 12:21    [W:0.279 / U:0.224 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site