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>
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 2c7c082..bb821a9 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1660,10 +1660,13 @@
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)