summaryrefslogtreecommitdiffstats
path: root/fs/ext4
diff options
context:
space:
mode:
authorColy Li <colyli@gmail.com>2011-02-24 14:10:05 -0500
committerTheodore Ts'o <tytso@mit.edu>2011-02-24 14:10:05 -0500
commit5a54b2f199fdf19533f96c3e285b70c6729e1e4a (patch)
treebf5b23a197b71349076558d2d985848451194bab /fs/ext4
parent58696f3ab2b23fd6519189875fafdb5d1281eb54 (diff)
downloadop-kernel-dev-5a54b2f199fdf19533f96c3e285b70c6729e1e4a.zip
op-kernel-dev-5a54b2f199fdf19533f96c3e285b70c6729e1e4a.tar.gz
ext4: mballoc: don't replace the current preallocation group unnecessarily
In ext4_mb_check_group_pa(), the current preallocation space is replaced with a new preallocation space when the two have the same distance from the goal block. This doesn't actually gain us anything, so change things so that the function only switches to the new preallocation group if its distance from the goal block is strictly smaller than the current preallocaiton group's distance from the goal block. Signed-off-by: Coly Li <bosong.ly@taobao.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/mballoc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index b5235c8..66bee72 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3213,7 +3213,7 @@ ext4_mb_check_group_pa(ext4_fsblk_t goal_block,
cur_distance = abs(goal_block - cpa->pa_pstart);
new_distance = abs(goal_block - pa->pa_pstart);
- if (cur_distance < new_distance)
+ if (cur_distance <= new_distance)
return cpa;
/* drop the previous reference */
OpenPOWER on IntegriCloud