From: Chris Mason <chris.mason@oracle.com>
Date: Tue, 27 Nov 2007 00:47:05 +0000 (-0500)
Subject: Btrfs: Only limit btree writeback for pdflush
X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=8790bad7fb5ac4929dcd52c5dd8d6b81f8c05be8;p=linux-edison.git

Btrfs: Only limit btree writeback for pdflush

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 28e9ef8a325..8a74f9027d6 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -210,7 +210,7 @@ static int btree_writepages(struct address_space *mapping,
 {
 	struct extent_map_tree *tree;
 	tree = &BTRFS_I(mapping->host)->extent_tree;
-	if (wbc->sync_mode == WB_SYNC_NONE) {
+	if (wbc->sync_mode == WB_SYNC_NONE && current_is_pdflush()) {
 		u64 num_dirty;
 		u64 start = 0;
 		unsigned long thresh = 96 * 1024 * 1024;