From patchwork Mon Apr 8 01:41:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 13620450 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E48581EB3D; Mon, 8 Apr 2024 01:41:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712540518; cv=none; b=pV41QBmwOEUXNg+NKWpDdP3dlmuSt5f15df3lh+hylMxWUprT7avSA2LJBRVtsUma1O1INqsAX+3JQr2dNMR3E1tN6qQxf+M1xhP1VTQHRGZi7Ptzu1aiHFt7oRBsBEZNS+fwiWlBzHTZbymcswniRApPahBFEN/CpdsezjoPDA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712540518; c=relaxed/simple; bh=BAiWNhCwyIY1LaDWb3Dd92O78HHu2u6zYh3FJtbEcvw=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dfI+uYMu8zxXAijUTSw1MV/++xkOl7spih6I5It+utuEeuWgZvu13HJ8xgEBxzbCEIDNsVYvAMZr7+73DtPZEGYUrgHyv0vh/3gBBp2SJ2uJzktoZvGsPB6n+H2OI6xK4AWv1ac8Icmn4fvHKLJ67On7aOlzd+4m5S8RUm1iBlk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=T9XSrn2g; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="T9XSrn2g" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48C1DC43394; Mon, 8 Apr 2024 01:41:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1712540517; bh=BAiWNhCwyIY1LaDWb3Dd92O78HHu2u6zYh3FJtbEcvw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=T9XSrn2gljA/maWyfaIMjWYg+nPDvbA9ATjAGUw+rN6GsoqxJVeC/6hUMyy10B1dw WHc7ai5v+idZuBYvvp+oADDgChySFyEvSxH4QYQaTu7UKXGh6vO7Z2wNnPPcG/zzT/ SHDIXWSzSbgZS9bcBHEkHc+tezyZqgufgWqmwqXX7U0j/+FUovAif1iJEfriH4qJ2C bHDeLMp8wwoyGsfnI4BOnJsWMQQFtYcOH+xN4fH3hlyj3epFk5lOEls9N92c63mI/d Gwj5gHzV80TluQKZj4euC0wVHq1qSgOxA2RY2ncohyYZmSZMjtUfaa3MgbNBofMr2Y wnvrQcXliUp4A== From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" , dm-devel@lists.linux.dev, Mike Snitzer , linux-nvme@lists.infradead.org, Keith Busch , Christoph Hellwig Subject: [PATCH v7 14/28] ublk_drv: Do not request ELEVATOR_F_ZBD_SEQ_WRITE elevator feature Date: Mon, 8 Apr 2024 10:41:14 +0900 Message-ID: <20240408014128.205141-15-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408014128.205141-1-dlemoal@kernel.org> References: <20240408014128.205141-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 With zone write plugging enabled at the block layer level, any zone device can only ever see at most a single write operation per zone. There is thus no need to request a block scheduler with strick per-zone sequential write ordering control through the ELEVATOR_F_ZBD_SEQ_WRITE feature. Removing this allows using a zoned ublk device with any scheduler, including "none". Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke Reviewed-by: Christoph Hellwig Reviewed-by: Bart Van Assche Tested-by: Hans Holmberg Tested-by: Dennis Maisenbacher Reviewed-by: Martin K. Petersen --- drivers/block/ublk_drv.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index bea3d5cf8a83..ab6af84e327c 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -249,8 +249,7 @@ static int ublk_dev_param_zoned_validate(const struct ublk_device *ub) static void ublk_dev_param_zoned_apply(struct ublk_device *ub) { blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, ub->ub_disk->queue); - blk_queue_required_elevator_features(ub->ub_disk->queue, - ELEVATOR_F_ZBD_SEQ_WRITE); + ub->ub_disk->nr_zones = ublk_get_nr_zones(ub); }