---

yaml --- r: 129011 b: refs/heads/master c: 240d5d4 h: refs/heads/master i: 129009: 7c62ac6 129007: 0e3d2fb v: v3
git-mirror · Nov 10, 2008 · 4c71f98 · 4c71f98
1 parent 51e22e9
commit 4c71f98
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b47eda8690a10f4fc01eb7b795078fa3fa57149f
+refs/heads/master: 240d5d482b69415b92ffce4b8dfca10799c9890b
diff --git a/trunk/fs/btrfs/disk-io.c b/trunk/fs/btrfs/disk-io.c
@@ -1201,6 +1201,16 @@ void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page)
 		return;
 
 	inode = mapping->host;
+
+	/*
+	 * don't do the expensive searching for a small number of
+	 * devices
+	 */
+	if (BTRFS_I(inode)->root->fs_info->fs_devices->open_devices <= 2) {
+		__unplug_io_fn(bdi, page);
+		return;
+	}
+
 	offset = page_offset(page);
 
 	em_tree = &BTRFS_I(inode)->extent_tree;