diff options
| author | Stefan Behrens | 2012-04-27 18:41:46 +0200 |
|---|---|---|
| committer | Chris Mason | 2012-04-27 19:55:14 +0200 |
| commit | 1f699d38b6556c393ac80f1c23c2053502a51631 (patch) | |
| tree | 9ba8e3c95cc044461eab17dfba50515535ca2a25 | |
| parent | Btrfs: Prevent root_list corruption (diff) | |
| download | kernel-qcow2-linux-1f699d38b6556c393ac80f1c23c2053502a51631.tar.gz kernel-qcow2-linux-1f699d38b6556c393ac80f1c23c2053502a51631.tar.xz kernel-qcow2-linux-1f699d38b6556c393ac80f1c23c2053502a51631.zip | |
Btrfs: fix block_rsv and space_info lock ordering
may_commit_transaction() calls
spin_lock(&space_info->lock);
spin_lock(&delayed_rsv->lock);
and update_global_block_rsv() calls
spin_lock(&block_rsv->lock);
spin_lock(&sinfo->lock);
Lockdep complains about this at run time.
Everywhere except in update_global_block_rsv(), the space_info lock is
the outer lock, therefore the locking order in update_global_block_rsv()
is changed.
Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 84497f8eb043..6fc2e6f5aab8 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4214,8 +4214,8 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info) num_bytes = calc_global_metadata_size(fs_info); - spin_lock(&block_rsv->lock); spin_lock(&sinfo->lock); + spin_lock(&block_rsv->lock); block_rsv->size = num_bytes; @@ -4241,8 +4241,8 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info) block_rsv->full = 1; } - spin_unlock(&sinfo->lock); spin_unlock(&block_rsv->lock); + spin_unlock(&sinfo->lock); } static void init_global_block_rsv(struct btrfs_fs_info *fs_info) |