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Message-Id: <1346937415-2866-1-git-send-email-xiaoqiangnk@gmail.com>
Date: Thu, 6 Sep 2012 21:16:54 +0800
From: Yongqiang Yang <xiaoqiangnk@...il.com>
To: linux-ext4@...r.kernel.org
Cc: tytso@....edu, Yongqiang Yang <xiaoqiangnk@...il.com>
Subject: [PATCH 1/2 v2] ext4: check free block counters in ext4_mb_find_by_goal
Free block counters should be checked before doing allocation.
Signed-off-by: Yongqiang Yang <xiaoqiangnk@...il.com>
---
fs/ext4/mballoc.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 6873571..5d4c21a 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1659,10 +1659,13 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
int max;
int err;
struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
+ struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group);
struct ext4_free_extent ex;
if (!(ac->ac_flags & EXT4_MB_HINT_TRY_GOAL))
return 0;
+ if (grp->bb_free == 0)
+ return 0;
err = ext4_mb_load_buddy(ac->ac_sb, group, e4b);
if (err)
--
1.7.5.1
--
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