diff options
| author | Chris Mason <[email protected]> | 2009-06-10 19:17:02 +0000 |
|---|---|---|
| committer | Chris Mason <[email protected]> | 2009-06-10 19:17:02 +0000 |
| commit | e5e9a5206a171b2c467e494aebcdcf70c47289bc (patch) | |
| tree | d9a6a89cccbd084db923f1661b52d5a1dfdb83fe /fs/btrfs/async-thread.c | |
| parent | Fix btrfs when ACLs are configured out (diff) | |
| download | kernel-e5e9a5206a171b2c467e494aebcdcf70c47289bc.tar.gz kernel-e5e9a5206a171b2c467e494aebcdcf70c47289bc.zip | |
Btrfs: avoid races between super writeout and device list updates
On multi-device filesystems, btrfs writes supers to all of the devices
before considering a sync complete. There wasn't any additional
locking between super writeout and the device list management code
because device management was done inside a transaction and
super writeout only happened with no transation writers running.
With the btrfs fsync log and other async transaction updates, this
has been racey for some time. This adds a mutex to protect
the device list. The existing volume mutex could not be reused due to
transaction lock ordering requirements.
Signed-off-by: Chris Mason <[email protected]>
Diffstat (limited to 'fs/btrfs/async-thread.c')
0 files changed, 0 insertions, 0 deletions