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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2011-04-20 10:09:16 +0000 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-05-23 13:24:43 -0400 |
| commit | 1f78160ce1b1b8e657e2248118c4d91f881763f0 (patch) | |
| tree | 98c5496a9ab3e77e4cd682c0487f4c0127198396 /fs/btrfs/volumes.h | |
| parent | 46224705656633466ca7dc71d81b3c0abc76cae4 (diff) | |
| download | lwn-1f78160ce1b1b8e657e2248118c4d91f881763f0.tar.gz lwn-1f78160ce1b1b8e657e2248118c4d91f881763f0.zip | |
Btrfs: using rcu lock in the reader side of devices list
fs_devices->devices is only updated on remove and add device paths, so we can
use rcu to protect it in the reader side
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
| -rw-r--r-- | fs/btrfs/volumes.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index cc2eadaf7a27..f1b2e4f53fc2 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -86,6 +86,8 @@ struct btrfs_device { u8 uuid[BTRFS_UUID_SIZE]; struct btrfs_work work; + struct rcu_head rcu; + struct work_struct rcu_work; }; struct btrfs_fs_devices { |