From d57bc7702e49c453a59259a3f6a52d34aa00aa42 Mon Sep 17 00:00:00 2001
From: Miao Xie <miaox@cn.fujitsu.com>
Date: Fri, 9 Sep 2011 17:34:35 +0800
Subject: [PATCH] --- yaml --- r: 274671 b: refs/heads/master c:
 60d2adbb1e7fee1cb4bc67f70bd0bd8ace7b6c3c h: refs/heads/master i:   274669:
 d00e07828a0ae611acc4fb03adf9417f71e8460b   274667:
 5e1f00334b5c0733d0eb7eb83b847ab74550c84c   274663:
 655664ff7f790b21bc100de33813e7a5a6f7458e   274655:
 596ed21243aac8662e6d25bdd6935f1da5bdae91 v: v3

---
 [refs]                       | 2 +-
 trunk/fs/btrfs/extent-tree.c | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index a60bdc8794d5..5f6a713e590b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cfbffc39ac89dbd5197cbeec2599a1128eb928f8
+refs/heads/master: 60d2adbb1e7fee1cb4bc67f70bd0bd8ace7b6c3c
diff --git a/trunk/fs/btrfs/extent-tree.c b/trunk/fs/btrfs/extent-tree.c
index 6cfcc9060c83..cef355f1328a 100644
--- a/trunk/fs/btrfs/extent-tree.c
+++ b/trunk/fs/btrfs/extent-tree.c
@@ -4954,6 +4954,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
 	bool failed_cluster_refill = false;
 	bool failed_alloc = false;
 	bool use_cluster = true;
+	bool have_caching_bg = false;
 	u64 ideal_cache_percent = 0;
 	u64 ideal_cache_offset = 0;
 
@@ -5036,6 +5037,7 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
 		}
 	}
 search:
+	have_caching_bg = false;
 	down_read(&space_info->groups_sem);
 	list_for_each_entry(block_group, &space_info->block_groups[index],
 			    list) {
@@ -5244,6 +5246,8 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
 			failed_alloc = true;
 			goto have_block_group;
 		} else if (!offset) {
+			if (!cached)
+				have_caching_bg = true;
 			goto loop;
 		}
 checks:
@@ -5294,6 +5298,9 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
 	}
 	up_read(&space_info->groups_sem);
 
+	if (!ins->objectid && loop >= LOOP_CACHING_WAIT && have_caching_bg)
+		goto search;
+
 	if (!ins->objectid && ++index < BTRFS_NR_RAID_TYPES)
 		goto search;