From fa6fec82811bc6ebd3c4337ae4dae36c802c0fc1 Mon Sep 17 00:00:00 2001 From: John Garry Date: Mon, 18 Nov 2024 10:50:16 +0000 Subject: [PATCH] md/raid0: Atomic write support Set BLK_FEAT_ATOMIC_WRITES_STACKED to enable atomic writes. All other stacked device request queue limits should automatically be set properly. With regards to atomic write max bytes limit, this will be set at hw_max_sectors and this is limited by the stripe width, which we want. Reviewed-by: Yu Kuai Signed-off-by: John Garry Reviewed-by: Martin K. Petersen Link: https://lore.kernel.org/r/20241118105018.1870052-4-john.g.garry@oracle.com Signed-off-by: Jens Axboe --- drivers/md/raid0.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index baaf5f8b80ae..7049ec7fb8eb 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -384,6 +384,7 @@ static int raid0_set_limits(struct mddev *mddev) lim.max_write_zeroes_sectors = mddev->chunk_sectors; lim.io_min = mddev->chunk_sectors << 9; lim.io_opt = lim.io_min * mddev->raid_disks; + lim.features |= BLK_FEAT_ATOMIC_WRITES_STACKED; err = mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY); if (err) { queue_limits_cancel_update(mddev->gendisk->queue); -- 2.50.1