linux-ext4 - [Bug 102731] I have a cough.

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Date:	Tue, 20 Oct 2015 15:44:59 +0000
From:	bugzilla-daemon@...zilla.kernel.org
To:	linux-ext4@...r.kernel.org
Subject: [Bug 102731] I have a cough.

https://bugzilla.kernel.org/show_bug.cgi?id=102731

--- Comment #27 from John Hughes <john@...va.com> ---
And now I have had (with 4.2.3) an error on my /home filesystem:

Oct 20 16:06:58 olympic kernel: [ 8027.714881] EXT4-fs error (device dm-2):
ext4_mb_generate_buddy:758: group 519, block bitmap and bg descriptor
inconsistent: 22589 vs 22588 free clusters
Oct 20 16:06:58 olympic kernel: [ 8027.718806] Aborting journal on device
dm-2-8.
Oct 20 16:06:58 olympic kernel: [ 8027.722387] EXT4-fs (dm-2): Remounting
filesystem read-only
Oct 20 16:06:58 olympic kernel: [ 8027.724291] EXT4-fs error (device dm-2) in
ext4_free_blocks:4889: Journal has aborted
Oct 20 16:06:58 olympic kernel: [ 8027.727369] EXT4-fs error (device dm-2) in
ext4_do_update_inode:4504: Journal has aborted
Oct 20 16:06:58 olympic kernel: [ 8027.735809] EXT4-fs error (device dm-2) in
ext4_truncate:3789: IO failure
Oct 20 16:06:58 olympic kernel: [ 8027.739795] EXT4-fs error (device dm-2) in
ext4_orphan_del:2895: Journal has aborted
Oct 20 16:06:58 olympic kernel: [ 8027.743834] EXT4-fs error (device dm-2) in
ext4_do_update_inode:4504: Journal has aborted

Note that this is the ext4_mb_generate_buddy error cwseys mentioned.  AARGH!

When I ran fsck only one error was detected: "block bitmap differences
+17016320"

As the system was down I've moved the host to 4.2.3 (the users were already
screaming, so...)

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