Commit d85c8a6f authored by Chris Mason's avatar Chris Mason
Browse files

Btrfs: unplug every once and a while 



The btrfs io submission threads can build up massive plug lists.  This
keeps things more reasonable so we don't hand over huge dumps of IO at
once.

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 567a45e9

fs/btrfs/volumes.c

+6 −0
Original line number Diff line number Diff line
@@ -295,6 +295,12 @@ static noinline int run_scheduled_bios(struct btrfs_device *device) 
			btrfs_requeue_work(&device->work);

			goto done;

		}

		/* unplug every 64 requests just for good measure */

		if (batch_run % 64 == 0) {

			blk_finish_plug(&plug);

			blk_start_plug(&plug);

			sync_pending = 0;

		}

	}



	cond_resched();