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Commit 838cd0cf authored by Yongqiang Yang's avatar Yongqiang Yang Committed by Theodore Ts'o
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ext4: check free block counters in ext4_mb_find_by_goal 



Free block counters should be checked before doing allocation.

Signed-off-by: default avatarYongqiang Yang <xiaoqiangnk@gmail.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 50df9fd5

fs/ext4/mballoc.c

+3 −0
Original line number Diff line number Diff line
@@ -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)