diff options
Diffstat (limited to 'fs/btrfs/tree-mod-log.c')
| -rw-r--r-- | fs/btrfs/tree-mod-log.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/fs/btrfs/tree-mod-log.c b/fs/btrfs/tree-mod-log.c index 1ac2678fc4ca..dcb8aef6e900 100644 --- a/fs/btrfs/tree-mod-log.c +++ b/fs/btrfs/tree-mod-log.c @@ -164,6 +164,30 @@ static noinline int tree_mod_log_insert(struct btrfs_fs_info *fs_info, return 0; } +static inline bool skip_eb_logging(const struct extent_buffer *eb) +{ + const u64 owner = btrfs_header_owner(eb); + + if (btrfs_header_level(eb) == 0) + return true; + + /* + * Tree mod logging exists so that there's a consistent view of the + * extents and backrefs of inodes even if while a task is iterating over + * them other tasks are modifying subvolume trees and the extent tree + * (including running delayed refs). So we only need to log extent + * buffers from the extent tree and subvolume trees. + */ + + if (owner == BTRFS_EXTENT_TREE_OBJECTID) + return false; + + if (btrfs_is_fstree(owner)) + return false; + + return true; +} + /* * Determines if logging can be omitted. Returns true if it can. Otherwise, it * returns false with the tree_mod_log_lock acquired. The caller must hold @@ -174,7 +198,7 @@ static bool tree_mod_dont_log(struct btrfs_fs_info *fs_info, const struct extent { if (!test_bit(BTRFS_FS_TREE_MOD_LOG_USERS, &fs_info->flags)) return true; - if (eb && btrfs_header_level(eb) == 0) + if (eb && skip_eb_logging(eb)) return true; write_lock(&fs_info->tree_mod_log_lock); @@ -192,7 +216,7 @@ static bool tree_mod_need_log(const struct btrfs_fs_info *fs_info, { if (!test_bit(BTRFS_FS_TREE_MOD_LOG_USERS, &fs_info->flags)) return false; - if (eb && btrfs_header_level(eb) == 0) + if (eb && skip_eb_logging(eb)) return false; return true; |