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| author | Yongqiang Yang <xiaoqiangnk@gmail.com> | 2012-09-24 05:10:51 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2012-09-24 05:10:51 +0200 |
| commit | 838cd0cf9af52e034ee81513642083bbe8e4ddb1 (patch) | |
| tree | 46d4b49c068756af2bee025caca0759833e39310 | |
| parent | ext4: fix crash when accessing /proc/mounts concurrently (diff) | |
| download | linux-838cd0cf9af52e034ee81513642083bbe8e4ddb1.tar.xz linux-838cd0cf9af52e034ee81513642083bbe8e4ddb1.zip | |
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@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
| -rw-r--r-- | 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 2c7c082b8169..bb821a924049 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -1660,10 +1660,13 @@ 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) |