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btrfs: reduce critical section at btrfs_wait_ordered_roots()

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At btrfs_wait_ordered_roots(), there's no point in decrementing the
counter after locking fs_info->ordered_root_lock as the counter is local.
So change this to decrement the counter before taking the lock.

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2024-06-03 13:25:00 +01:00 committed by David Sterba
parent 2917f74102
commit 03103ecf5e
1 changed files with 3 additions and 3 deletions
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6
fs/btrfs/ordered-data.c
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@ -829,10 +829,10 @@ void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
done = btrfs_wait_ordered_extents(root, nr, bg);
btrfs_put_root(root);
spin_lock(&fs_info->ordered_root_lock);
if (nr != U64_MAX) {
if (nr != U64_MAX)
nr -= done;
}
spin_lock(&fs_info->ordered_root_lock);
}
list_splice_tail(&splice, &fs_info->ordered_roots);
spin_unlock(&fs_info->ordered_root_lock);