From patchwork Mon Mar 25 04:44:40 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: 782988 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 3488D1C32A2; Mon, 25 Mar 2024 04:45:27 +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=1711341927; cv=none; b=V/FfkEt0Z2ytUDJZpOontyLCDYIAvweQ/uQDiM9CSj0aARzHbFiDFRkGEvxw5K2hUcoaPPNXBhvA90OaNLfFAhncdD6NB3MSRzw7NHJJDWcuksaU5yIlp5M8xbQun6Jfo/yttjZ5FlTnxijII8Ftt7KXMmRSlq+VaT4wQ+FpBw8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711341927; c=relaxed/simple; bh=qoEibzLZjgtTKtSOz/7gZtcAbueqRKkO2g10bjgbvI4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=FcKY93Ez4XQgSjiNdzIBYPYt9ud9qZdd73SDlo9SyiQ8g1tphjnVi9CIWNAEZ6qB839HGJHTdt/LHecJHeVEgG0I1HHOq18fZGEUMY/fxOR/pLzKaySTt0TBUgsHVWsWE/D/Wz9S4hZR4MY/hM6YF5Nc5HjIZizgp2pN7/JB6N8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TkDWynDa; 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="TkDWynDa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3607C433F1; Mon, 25 Mar 2024 04:45:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711341927; bh=qoEibzLZjgtTKtSOz/7gZtcAbueqRKkO2g10bjgbvI4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TkDWynDagp4tWvq/qsONeOgOoBKiQPUZA1vLGZDaY+MI5Tc2QMlPAthOAzNESio9J bmFAKmCgMEgzZOlfE9bcF14D9sCUahpb/xn5dmtaqRtRmFTNeHkLj2kOxDlOCa+jEA z+bjVlyQ697G44V4G9rYP0SqlxLx6a+O8nNsiWr359TLJpvGrLu2SCL1cNEXibY3FN x/4uW2b25C0wP9a0vNOLVAocOXUCXDGVxtdstpkaG3p3xae4N8XuCzHWicseOebQUU Dbj9ZLMWvderdqYPHveHEqq3LHY7RQQ86QC99Up10YuI3wAow3+jr7DVWN+lfym1Zv NKSdFuN6jEKVA== 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 v2 16/28] null_blk: Do not request ELEVATOR_F_ZBD_SEQ_WRITE elevator feature Date: Mon, 25 Mar 2024 13:44:40 +0900 Message-ID: <20240325044452.3125418-17-dlemoal@kernel.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240325044452.3125418-1-dlemoal@kernel.org> References: <20240325044452.3125418-1-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 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 1689e2584104..8e217f8fadcd 100644 --- a/drivers/block/null_blk/zoned.c +++ b/drivers/block/null_blk/zoned.c @@ -165,7 +165,6 @@ int null_register_zoned_dev(struct nullb *nullb) struct request_queue *q = nullb->q; blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); - blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE); nullb->disk->nr_zones = bdev_nr_zones(nullb->disk->part0); return blk_revalidate_disk_zones(nullb->disk, NULL); }