From patchwork Fri Feb 2 07:30:51 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: 13542273 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 576EF1B277; Fri, 2 Feb 2024 07:31:26 +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=1706859086; cv=none; b=SjkFbht6JX9OCCBBqLLJkzDhz/wBPDn0mg5pBZdqFtjgMPs/MkcTfCpl6YIddKBJh0ICh/6HqoazkL9NYV569sIRTSJWdTFIuF9gKwCg/PT8ShHCV1ufktiTQrC0bOJcl9MX29PVD347NOf6SGL9rcrG5CcNh9F3OxTgcwb1/+k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706859086; c=relaxed/simple; bh=gG/e2UXGR8jcCK5nJZ7d3Zge+Q6B/zA4dQp4IMov1Wo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mqK533bGn/2T3hY/p8zxeCXsIdho3rDtWK01mIlqeIn/z4gYwjJj3oPOtlEAwxIIoNi/sxED48IEyBmLqnH+IrvALsTQBE+TZ+ifz1Aley49R/Pq3UeqoccFu64+taQUSmuN9ZurqVTHyArjvNMDpo8PSehKjS9QrOy4wAswxIc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Vu/nMIj5; 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="Vu/nMIj5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0604C433C7; Fri, 2 Feb 2024 07:31:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706859085; bh=gG/e2UXGR8jcCK5nJZ7d3Zge+Q6B/zA4dQp4IMov1Wo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Vu/nMIj5FtinJ+eoDDtmqapOOgiGtAhglj8ZiUQU/6AHosMDJcyPcQXAu3M57MTuq 9OHWgl/AeIojDVepqR8I99RBtEmDJGHkTDgAsmRQfpRAwjb81lrpLnky7NAKq9pgK5 isBRauizXrNnnW6xF6IMzRc1mJ93di1BJY2Bs0Tn2ag2G0ZqXMbf6A08PNSQ5ofjgy 5nnWvDiYb5gSNSipUR3G/Efu+MqwUnkE/C3tan6RLpXu9ppnt87OQHL5PHczgCalTT 8AWhUUf3g9YDnCy7UeuZ0eYz5zhj6k/SiiiRDcZKA2w82CeDfbUTW3LSYeiVe49O8a PZrC6wzEf8soA== 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 Cc: Christoph Hellwig Subject: [PATCH 13/26] null_blk: Do not request ELEVATOR_F_ZBD_SEQ_WRITE elevator feature Date: Fri, 2 Feb 2024 16:30:51 +0900 Message-ID: <20240202073104.2418230-14-dlemoal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240202073104.2418230-1-dlemoal@kernel.org> References: <20240202073104.2418230-1-dlemoal@kernel.org> Precedence: bulk X-Mailing-List: linux-block@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 null_blk device with any scheduler, including "none". Signed-off-by: Damien Le Moal Reviewed-by: Hannes Reinecke --- drivers/block/null_blk/zoned.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c index 6f5e0994862e..f2cb6da0dd0d 100644 --- a/drivers/block/null_blk/zoned.c +++ b/drivers/block/null_blk/zoned.c @@ -161,7 +161,6 @@ int null_register_zoned_dev(struct nullb *nullb) disk_set_zoned(nullb->disk); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); - blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE); blk_queue_chunk_sectors(q, dev->zone_size_sects); nullb->disk->nr_zones = bdev_nr_zones(nullb->disk->part0); blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);