[Bug 528981] Re: Repetitive massive filesystem corruption

[Scott Testerman]

More errors related to 2.6.32-16.24, but they happened after an
unexplained system lockup.  Unfortunately, the error also destroyed
Firefox, which was the open application when the lockup occurred.
Fortunately, enough of the system was still functioning that error
messages were logged at the end of dmesg:

[  262.957715] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 572: 155 blocks in bitmap, 280 in gd
[  262.957734] Aborting journal on device sda1-8.
[  262.960225] EXT4-fs error (device sda1): ext4_journal_start_sb: Detected aborted journal
[  262.960240] EXT4-fs (sda1): Remounting filesystem read-only
[  262.985668] EXT4-fs (sda1): Remounting filesystem read-only
[  263.028132] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 576: 169 blocks in bitmap, 320 in gd
[  263.065760] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 633: 242 blocks in bitmap, 479 in gd
[  263.066814] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 638: 100 blocks in bitmap, 318 in gd
[  263.077529] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 644: 276 blocks in bitmap, 503 in gd
[  263.078601] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 649: 317 blocks in bitmap, 601 in gd
[  263.079040] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 651: 313 blocks in bitmap, 619 in gd
[  263.079679] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 654: 390 blocks in bitmap, 691 in gd
[  263.079906] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 655: 347 blocks in bitmap, 624 in gd
[  263.089608] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 661: 427 blocks in bitmap, 839 in gd
[  263.090097] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 665: 471 blocks in bitmap, 824 in gd
[  263.090327] EXT4-fs error (device sda1): ext4_mb_generate_buddy: EXT4-fs: group 666: 447 blocks in bitmap, 877 in gd
[  263.090681] EXT4-fs (sda1): delayed block allocation failed for inode 4588580 at logical offset 0 with max blocks 3534 with error -30

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Repetitive massive filesystem corruption
https://bugs.launchpad.net/bugs/528981
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