diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index de05525..eef4ab5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -210,7 +210,7 @@
 {
 	struct extent_map_tree *tree;
 	tree = &BTRFS_I(mapping->host)->extent_tree;
-	if (wbc->sync_mode == WB_SYNC_NONE && current_is_pdflush()) {
+	if (wbc->sync_mode == WB_SYNC_NONE) {
 		u64 num_dirty;
 		u64 start = 0;
 		unsigned long thresh = 96 * 1024 * 1024;
@@ -218,6 +218,11 @@
 		if (wbc->for_kupdate)
 			return 0;
 
+		if (current_is_pdflush()) {
+			thresh = 96 * 1024 * 1024;
+		} else {
+			thresh = 8 * 1024 * 1024;
+		}
 		num_dirty = count_range_bits(tree, &start, thresh, EXTENT_DIRTY);
 		if (num_dirty < thresh) {
 			return 0;