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| author | Wang Shilong <wangsl.fnst@cn.fujitsu.com> | 2014-02-13 07:19:47 +0400 |
|---|---|---|
| committer | Josef Bacik <jbacik@fb.com> | 2014-03-10 23:16:55 +0400 |
| commit | e84752d434b5cca0869e906e7b94d0531b25c6d3 (patch) | |
| tree | ead4db0b6f80fef7abfde5396dbd1f7967cc2b9a /fs/btrfs/backref.c | |
| parent | 32a447896c7b4c5cf5502a3ca7f5ef57d498fb03 (diff) | |
| download | linux-e84752d434b5cca0869e906e7b94d0531b25c6d3.tar.xz | |
Btrfs: skip locking when searching commit root
We won't change commit root, skip locking dance with commit root
when walking backrefs, this can speed up btrfs send operations.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Diffstat (limited to 'fs/btrfs/backref.c')
| -rw-r--r-- | fs/btrfs/backref.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index a88da721dfc5..860f4f22b9b0 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -873,8 +873,10 @@ static int find_parent_nodes(struct btrfs_trans_handle *trans, path = btrfs_alloc_path(); if (!path) return -ENOMEM; - if (!trans) + if (!trans) { path->search_commit_root = 1; + path->skip_locking = 1; + } /* * grab both a lock on the path and a lock on the delayed ref head. |