diff options
| author | Chris Mason <chris.mason@oracle.com> | 2007-08-08 20:17:12 -0400 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-08-08 20:17:12 -0400 |
| commit | 409eb95d7f6632d5af32b795244ce68a29e49319 (patch) | |
| tree | d652da6d5c5055a5f090e3327e512d752d430279 | |
| parent | 26b8003f10569a9155b7539ef5a7379ee0c6b050 (diff) | |
Btrfs: Further reduce the concurrency penalty of defrag and drop_snapshot
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/extent-tree.c | 13 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 3 | ||||
| -rw-r--r-- | fs/btrfs/tree-defrag.c | 7 |
3 files changed, 11 insertions, 12 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index ba50bd7b9a7..120c448f58f 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1312,7 +1312,10 @@ static void reada_walk_down(struct btrfs_root *root, BUG_ON(ret); if (refs != 1) continue; + mutex_unlock(&root->fs_info->fs_mutex); ret = readahead_tree_block(root, blocknr); + cond_resched(); + mutex_lock(&root->fs_info->fs_mutex); if (ret) break; } @@ -1445,7 +1448,6 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root struct btrfs_path *path; int i; int orig_level; - int num_walks = 0; struct btrfs_root_item *root_item = &root->root_item; path = btrfs_alloc_path(); @@ -1486,12 +1488,9 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root break; if (wret < 0) ret = wret; - num_walks++; - if (num_walks > 2) { - ret = -EAGAIN; - get_bh(root->node); - break; - } + ret = -EAGAIN; + get_bh(root->node); + break; } for (i = 0; i <= orig_level; i++) { if (path->nodes[i]) { diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index e64ecec3f52..204337c5ca0 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -364,6 +364,9 @@ int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info) break; } root->defrag_running = 0; + radix_tree_tag_clear(&info->fs_roots_radix, + (unsigned long)root->root_key.objectid, + BTRFS_ROOT_DEFRAG_TAG); } } btrfs_end_transaction(trans, tree_root); diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c index 15d0a486fb5..7ea66b4aa5c 100644 --- a/fs/btrfs/tree-defrag.c +++ b/fs/btrfs/tree-defrag.c @@ -148,7 +148,6 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, int level; int orig_level; int i; - int num_runs = 0; if (root->ref_cows == 0) { goto out; @@ -200,10 +199,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, break; if (wret < 0) ret = wret; - if (num_runs++ > 8) { - ret = -EAGAIN; - break; - } + ret = -EAGAIN; + break; } for (i = 0; i <= orig_level; i++) { if (path->nodes[i]) { |