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| author | Nikolay Borisov | 2019-05-09 17:11:11 +0200 |
|---|---|---|
| committer | David Sterba | 2019-07-01 13:34:59 +0200 |
| commit | 0b6f5d408bb5df3101eb1944b1f301dea50c7e7e (patch) | |
| tree | 1e4cc071f098729f54b015990f77704290a58531 /fs/btrfs/volumes.c | |
| parent | btrfs: Always use a cached extent_state in btrfs_lock_and_flush_ordered_range (diff) | |
| download | kernel-qcow2-linux-0b6f5d408bb5df3101eb1944b1f301dea50c7e7e.tar.gz kernel-qcow2-linux-0b6f5d408bb5df3101eb1944b1f301dea50c7e7e.tar.xz kernel-qcow2-linux-0b6f5d408bb5df3101eb1944b1f301dea50c7e7e.zip | |
btrfs: Add comments on locking of several device-related fields
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 5514ae801f4c..776f5c7ca7c5 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -239,7 +239,9 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, * chunk_mutex * ----------- * protects chunks, adding or removing during allocation, trim or when a new - * device is added/removed + * device is added/removed. Additionally it also protects post_commit_list of + * individual devices, since they can be added to the transaction's + * post_commit_list only with chunk_mutex held. * * cleaner_mutex * ------------- |