Commit 198868f3 authored Mar 05, 2011 by Mingming Cao Committed by Theodore Ts'o Mar 05, 2011

ext4: Use single thread to perform DIO unwritten convertion



While running ext4 testing on multiple core, we found there are per
cpu ext4-dio-unwritten threads processing conversion from unwritten
extents to written for IOs completed from async direct IO patch.  Per
filesystem is enough, we don't need per cpu threads to work on
conversion.

Signed-off-by: Mingming Cao <cmm@us.ibm.com>

parent b6168443

fs/ext4/super.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3514,7 +3514,7 @@ 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");
		EXT4_SB(sb)->dio_unwritten_wq = create_singlethread_workqueue("ext4-dio-unwritten");
		if (!EXT4_SB(sb)->dio_unwritten_wq) {
		printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");
		goto failed_mount_wq;