path: root/fs/jbd
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authorJan Kara <jack@suse.cz>2013-03-20 14:39:05 +0100
committerJan Kara <jack@suse.cz>2013-03-20 14:49:04 +0100
commite643692138cfa33528f054b071ba2583509bb217 (patch)
treeb63549da76a42fa95968a6c472c0bcb059e172bd /fs/jbd
parentext2: Fix BUG_ON in evict() on inode deletion (diff)
ext3: fix data=journal fast mount/umount hang
In data=journal mode, if we unmount the file system before a transaction has a chance to complete, when the journal inode is being evicted, we can end up calling into log_wait_commit() for the last transaction, after the journalling machinery has been shut down. That triggers the WARN_ONCE in __log_start_commit(). Arguably we should adjust ext3_should_journal_data() to return FALSE for the journal inode, but the only place it matters is ext3_evict_inode(), and so it's to save a bit of CPU time, and to make the patch much more obviously correct by inspection(tm), we'll fix it by explicitly not trying to waiting for a journal commit when we are evicting the journal inode, since it's guaranteed to never succeed in this case. This can be easily replicated via: mount -t ext3 -o data=journal /dev/vdb /vdb ; umount /vdb This is a port of ext4 fix from Ted Ts'o. Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/jbd')
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