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Commit 198868f3 authored by Mingming Cao's avatar Mingming Cao Committed by Theodore Ts'o
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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: default avatarMingming Cao <cmm@us.ibm.com>
parent b6168443

fs/ext4/super.c

+1 −1
Original line number Original line 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);

	percpu_counter_set(&sbi->s_dirtyblocks_counter, 0);





no_journal:

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) {

	if (!EXT4_SB(sb)->dio_unwritten_wq) {

		printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");

		printk(KERN_ERR "EXT4-fs: failed to create DIO workqueue\n");

		goto failed_mount_wq;

		goto failed_mount_wq;