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| author | Ioannis Angelakopoulos <iangelak@fb.com> | 2022-07-25 15:11:54 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-09-26 12:27:53 +0200 |
| commit | 8b53779eaa98b55f4cccadd4d12b3233e9633140 (patch) | |
| tree | 7ed293cc2c403be956cbeddc43316b7a40c10567 /fs/btrfs/disk-io.c | |
| parent | 3e738c531aad8caa7f3d20ab878a8a0d3574e730 (diff) | |
| download | linux-8b53779eaa98b55f4cccadd4d12b3233e9633140.tar.gz linux-8b53779eaa98b55f4cccadd4d12b3233e9633140.tar.bz2 linux-8b53779eaa98b55f4cccadd4d12b3233e9633140.zip | |
btrfs: add lockdep annotations for pending_ordered wait event
In contrast to the num_writers and num_extwriters wait events, the
condition for the pending ordered wait event is signaled in a different
context from the wait event itself. The condition signaling occurs in
btrfs_remove_ordered_extent() in fs/btrfs/ordered-data.c while the wait
event is implemented in btrfs_commit_transaction() in
fs/btrfs/transaction.c
Thus the thread signaling the condition has to acquire the lockdep map
as a reader at the start of btrfs_remove_ordered_extent() and release it
after it has signaled the condition. In this case some dependencies
might be left out due to the placement of the annotation, but it is
better than no annotation at all.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Ioannis Angelakopoulos <iangelak@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 68c6cb4e9283..393553fdfed6 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2992,6 +2992,7 @@ void btrfs_init_fs_info(struct btrfs_fs_info *fs_info) btrfs_lockdep_init_map(fs_info, btrfs_trans_num_writers); btrfs_lockdep_init_map(fs_info, btrfs_trans_num_extwriters); + btrfs_lockdep_init_map(fs_info, btrfs_trans_pending_ordered); btrfs_state_lockdep_init_map(fs_info, btrfs_trans_commit_start, BTRFS_LOCKDEP_TRANS_COMMIT_START); btrfs_state_lockdep_init_map(fs_info, btrfs_trans_unblocked, |