From: Mingming Cao Date: Sat, 5 Mar 2011 16:52:45 +0000 (-0500) Subject: ext4: Use single thread to perform DIO unwritten convertion X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=198868f35de99e7197829314076e5465c37e4cc5;p=deliverable%2Flinux.git 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 --- diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 9eaec22aa088..b357c2700d72 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -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;