From 838cd0cf9af52e034ee81513642083bbe8e4ddb1 Mon Sep 17 00:00:00 2001 From: Yongqiang Yang Date: Sun, 23 Sep 2012 23:10:51 -0400 Subject: [PATCH] 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 Signed-off-by: "Theodore Ts'o" --- fs/ext4/mballoc.c | 3 +++ 1 file changed, 3 insertions(+) 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) -- 2.30.2