1 files changed, 6 insertions, 1 deletions

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 5977b356a43..203f9e4a70b 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3511,7 +3511,12 @@ 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;