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| author | Chris Mason <chris.mason@oracle.com> | 2007-08-09 02:17:12 +0200 |
|---|---|---|
| committer | David Woodhouse <dwmw2@hera.kernel.org> | 2007-08-09 02:17:12 +0200 |
| commit | 409eb95d7f6632d5af32b795244ce68a29e49319 (patch) | |
| tree | d652da6d5c5055a5f090e3327e512d752d430279 /fs/btrfs/extent-tree.c | |
| parent | Btrfs: Replace extent tree preallocation code with some bit radix magic. (diff) | |
| download | linux-409eb95d7f6632d5af32b795244ce68a29e49319.tar.xz linux-409eb95d7f6632d5af32b795244ce68a29e49319.zip | |
Btrfs: Further reduce the concurrency penalty of defrag and drop_snapshot
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/extent-tree.c')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index ba50bd7b9a78..120c448f58f8 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]) { |