diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 48ce561fafacb8ca92ba2ef978db8736926e1bfc..0fcf6720af0914e678f0821e141362fd0ee944b7 100644
--- a/fs/ext4/super.c
+++ b/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;