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Message-ID: <20130318081551.GA379@x4>
Date:	Mon, 18 Mar 2013 09:15:51 +0100
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	linux-ext4@...r.kernel.org
Subject: "EXT4-fs error: ext4_mb_generate_buddy" errors during rsync

During the nightly rsync run that backups my root filesystem I got:

Mar 18 01:52:00 x4 fcron[19997]: Job /usr/bin/rsnapshot daily started for user root (pid 19998)
Mar 18 01:56:41 x4 rsnapshot[20187]: /usr/bin/rsnapshot daily: completed successfully
Mar 18 01:56:43 x4 fcron[19997]: Job /usr/bin/rsnapshot daily completed (mailing output)

Mar 18 01:52:21 x4 kernel: EXT4-fs error (device sda): ext4_mb_generate_buddy:749: group 6817, 7060 clusters in bitmap, 7064 in gd
Mar 18 01:52:21 x4 kernel: JBD2: Spotted dirty metadata buffer (dev = sda, blocknr = 0). There's a risk of filesystem corruption in case of system crash.
Mar 18 01:56:30 x4 kernel: EXT4-fs error (device sda): ext4_mb_generate_buddy:749: group 6833, 26653 clusters in bitmap, 26656 in gd
Mar 18 01:56:30 x4 kernel: EXT4-fs error (device sda): ext4_mb_generate_buddy:749: group 6881, 3985 clusters in bitmap, 3991 in gd
Mar 18 01:56:30 x4 kernel: EXT4-fs error (device sda): ext4_mb_generate_buddy:749: group 6897, 5979 clusters in bitmap, 6024 in gd

e2fsck 1.42 (29-Nov-2011)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Free blocks count wrong for group #6817 (6779, counted=6775).
Fix<y>? yes
Free blocks count wrong for group #6833 (26575, counted=26572).
Fix<y>? yes
Free blocks count wrong for group #6881 (3916, counted=3910).
Fix<y>? yes
Free blocks count wrong for group #6897 (5987, counted=5942).
Fix<y>? yes
Free blocks count wrong (185850303, counted=185850245).
Fix<y>? yes
/dev/sdb: ***** FILE SYSTEM WAS MODIFIED *****
/dev/sdb: 1619858/91578368 files (0.6% non-contiguous), 180434401/366284646 blocks

"smartctl -a /dev/sda" looks fine

-- 
Markus
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