Commit 1dffdddd authored Sep 08, 2016 by Shaohua Li

raid5: allow arbitrary max_hw_sectors



raid5 will split bio to proper size internally, there is no point to use
underlayer disk's max_hw_sectors. In my qemu system, without the change,
the raid5 only receives 128k size bio, which reduces the chance of bio
merge sending to underlayer disks.

Signed-off-by: Shaohua Li <shli@fb.com>

parent 694dda62

drivers/md/raid5.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -7066,6 +7066,8 @@ static int raid5_run(struct mddev *mddev)
		else
		queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD,
		mddev->queue);

		blk_queue_max_hw_sectors(mddev->queue, UINT_MAX);
		}

		if (journal_dev) {