| commit | b367e47fb3a70f5d24ebd6faf7d42436d485fb2d | [log] [tgz] |
|---|---|---|
| author | Li Zefan <lizf@cn.fujitsu.com> | Wed Dec 07 11:38:24 2011 +0800 |
| committer | Li Zefan <lizf@cn.fujitsu.com> | Wed Jan 11 10:26:54 2012 +0800 |
| tree | 5acc05bae14070f2dad3433a1482fe3a7bab0744 | |
| parent | c7c144db531fda414e532adac56e965ce332e2a5 [diff] |
Btrfs: fix possible deadlock when opening a seed device
The correct lock order is uuid_mutex -> volume_mutex -> chunk_mutex,
but when we mount a filesystem which has backing seed devices, we have
this lock chain:
open_ctree()
lock(chunk_mutex);
read_chunk_tree();
read_one_dev();
open_seed_devices();
lock(uuid_mutex);
and then we hit a lockdep splat.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>