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authorChris Mason <chris.mason@oracle.com>2008-06-26 00:01:30 +0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 19:04:03 +0400
commita213501153fd66e2359e091b1612841305ba6551 (patch)
tree1f4c316c9d3cad0eb6d9be14cb0e67e46e815dce /fs/btrfs/inode-map.c
parent925baeddc5b0764a53f2214a1253251bab0e0324 (diff)
downloadlinux-a213501153fd66e2359e091b1612841305ba6551.tar.xz
Btrfs: Replace the big fs_mutex with a collection of other locks
Extent alloctions are still protected by a large alloc_mutex. Objectid allocations are covered by a objectid mutex Other btree operations are protected by a lock on individual btree nodes Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode-map.c')
-rw-r--r--fs/btrfs/inode-map.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/btrfs/inode-map.c b/fs/btrfs/inode-map.c
index a0925eabdaa2..298346ae1481 100644
--- a/fs/btrfs/inode-map.c
+++ b/fs/btrfs/inode-map.c
@@ -69,6 +69,12 @@ int btrfs_find_free_objectid(struct btrfs_trans_handle *trans,
struct btrfs_key search_key;
u64 search_start = dirid;
+ mutex_lock(&root->objectid_mutex);
+ if (root->last_inode_alloc) {
+ *objectid = ++root->last_inode_alloc;
+ mutex_unlock(&root->objectid_mutex);
+ return 0;
+ }
path = btrfs_alloc_path();
BUG_ON(!path);
search_start = root->last_inode_alloc;
@@ -124,9 +130,11 @@ found:
btrfs_release_path(root, path);
btrfs_free_path(path);
BUG_ON(*objectid < search_start);
+ mutex_unlock(&root->objectid_mutex);
return 0;
error:
btrfs_release_path(root, path);
btrfs_free_path(path);
+ mutex_unlock(&root->objectid_mutex);
return ret;
}