diff --git a/[refs] b/[refs]
index 85922e0eacb2..c56783972d79 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 40f38ffb72cd58452dc5afc25ca5215bb90538a4
+refs/heads/master: fd89d5f2030ac83324330bfd0bc73abf1beadaa6
diff --git a/trunk/fs/ext4/super.c b/trunk/fs/ext4/super.c
index 48ce561fafac..0fcf6720af09 100644
--- a/trunk/fs/ext4/super.c
+++ b/trunk/fs/ext4/super.c
@@ -3507,7 +3507,12 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	percpu_counter_set(&sbi->s_dirtyblocks_counter, 0);
 
 no_journal:
-	EXT4_SB(sb)->dio_unwritten_wq = create_workqueue("ext4-dio-unwritten");
+	/*
+	 * The maximum number of concurrent works can be high and
+	 * concurrency isn't really necessary.  Limit it to 1.
+	 */
+	EXT4_SB(sb)->dio_unwritten_wq =
+		alloc_workqueue("ext4-dio-unwritten", WQ_MEM_RECLAIM, 1);
 	if (!EXT4_SB(sb)->dio_unwritten_wq) {
 		printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
 		goto failed_mount_wq;