From patchwork Thu Sep 6 13:16:54 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/2,v2] ext4: check free block counters in ext4_mb_find_by_goal Date: Thu, 06 Sep 2012 03:16:54 -0000 From: Yongqiang Yang X-Patchwork-Id: 182187 Message-Id: <1346937415-2866-1-git-send-email-xiaoqiangnk@gmail.com> To: linux-ext4@vger.kernel.org Cc: tytso@mit.edu, Yongqiang Yang Free block counters should be checked before doing allocation. Signed-off-by: Yongqiang Yang --- 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)