Bug 72401

Summary:	EXT4-fs error (device sdf1): ext4_mb_complex_scan_group:1786: group 11890, 254 free clusters as per group info. But got 256 blocks
Product:	File System	Reporter:	WeiZhang (zweiustc)
Component:	ext4	Assignee:	fs_ext4 (fs_ext4)
Status:	NEW ---
Severity:	normal	CC:	szg00000, zweiustc
Priority:	P1
Hardware:	IA-64
OS:	Linux
Kernel Version:	3.2	Subsystem:
Regression:	No	Bisected commit-id:

Description WeiZhang 2014-03-18 08:37:28 UTC

EXT4-fs error (device sdf1): ext4_mb_complex_scan_group:1786: group 11890254 free clusters as per group info. But got 256 blocks
EXT4-fs error (device sdf1): ext4_mb_complex_scan_group:1786: group 11890494 free clusters as per group info. But got 496 blocks
EXT4-fs error (device sdf1): ext4_mb_complex_scan_group:1786: group 125222297 free clusters as per group info. But got 2304 blocks


The server log showed that the num of free blocks diffs from the result we calculate from the extent tree. I have not found how to reproduce it but it happened on several servers. I am trying to reproduce it and look into the code. I wonder anyone once confronted such a case before.