From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konstantin Khlebnikov Subject: [PATCH RFC 2/3] md/raid0: enable REQ_NOWAIT Date: Mon, 01 Jun 2020 15:37:12 +0300 Message-ID: <159101503243.180989.945052901574296650.stgit@buzz> References: <159101473169.180989.12175693728191972447.stgit@buzz> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <159101473169.180989.12175693728191972447.stgit@buzz> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, Jens Axboe Cc: Christoph Hellwig List-Id: linux-raid.ids Set limits.nowait_requests = 1 before stacking limits. Raid itself does not delay bio in raid0_make_request(). Signed-off-by: Konstantin Khlebnikov --- drivers/md/raid0.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 322386ff5d22..e34292b05488 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -406,6 +406,9 @@ static int raid0_run(struct mddev *mddev) blk_queue_io_opt(mddev->queue, (mddev->chunk_sectors << 9) * mddev->raid_disks); + /* raid0_make_request() does not delay requests */ + mddev->queue->limits.nowait_requests = 1; + rdev_for_each(rdev, mddev) { disk_stack_limits(mddev->gendisk, rdev->bdev, rdev->data_offset << 9);