From patchwork Tue Nov 19 00:27:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 13879292 Received: from 009.lax.mailroute.net (009.lax.mailroute.net [199.89.1.12]) (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 13E3533991; Tue, 19 Nov 2024 00:28:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.1.12 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731976128; cv=none; b=ev1C9dK+PFUPw/pxThCG+jgxaZ5BwxrxroUZi3Z1jIBMBlfw5FHATBUGYLLob5VQeH4deyAZqnQGdO1lPvMDc0k1fEgA/q/ZZ0Ev/q8UItwDAfFtMJmLTodnqGAbgvssTvRVp9vBn+GubkMyg5Y0aerc3DHrsoBJs4sx16xt8IE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731976128; c=relaxed/simple; bh=bMQkL84IxjkXmmPRY6YMAlz/aLP/ZnxOX+IgNNanzjM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cPcQH05OTEGkGILhKrlDdE6dTRZPKkvXIusbG01yDyRnsyn8O3RjAl1E3/pQCiXfDdLDoNcbe/lLGOXz3iKDeD8uZMgF1HfC23GWlnyS9STTWdf1tCAfbvwCEd/Hz0mWAY6pR4/QfC2BJjZTBAE5ouZcZBAQAzrZQN2m6MN5C1s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=0UwpC/BD; arc=none smtp.client-ip=199.89.1.12 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="0UwpC/BD" Received: from localhost (localhost [127.0.0.1]) by 009.lax.mailroute.net (Postfix) with ESMTP id 4XsljB2GQLzlgMVR; Tue, 19 Nov 2024 00:28:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:references:in-reply-to :x-mailer:message-id:date:date:subject:subject:from:from :received:received; s=mr01; t=1731976121; x=1734568122; bh=5SJWf 5W2tyHPoFL/qgha2Dp6Z4cagmvWNWMma2DsGxg=; b=0UwpC/BDj5q586/vN759a lgzzxOC+jI1NvbHM8aloF/ErAqvbLbeyJjraaINqDLRmydAvYvqjhpwz/Q+DMu3J 7WsDYxVza+ha3ILmmYvAdZFw9LzV9yy+MHwNeSiMyCb5CcmSKdLluFg4g9NwqAET AnX3rk8HfOtDskVRoOW/HvPsKVCWoFAvUeFLF74FYXB/xSW0mmdhhPTdeG+R4HBG fjf7U6HbOO/TRX5YCZcQNvFsofHc0K6wju9QdICDIlTSpDDu//Am4w/H1UwzHNzH JTLAmJwtr95G8Tt6Kq2D/FJDIXGpXTeQYV7t+YLPbXScjP0VU6hEVozokkAxs9Eq A== X-Virus-Scanned: by MailRoute Received: from 009.lax.mailroute.net ([127.0.0.1]) by localhost (009.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id f4KXGpne-O9z; Tue, 19 Nov 2024 00:28:41 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.135.204.82]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 009.lax.mailroute.net (Postfix) with ESMTPSA id 4Xslj33qnnzlgVnY; Tue, 19 Nov 2024 00:28:39 +0000 (UTC) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, Christoph Hellwig , Damien Le Moal , Jaegeuk Kim , Bart Van Assche , Hannes Reinecke , Nitesh Shetty , Ming Lei Subject: [PATCH v16 07/26] block: Support block drivers that preserve the order of write requests Date: Mon, 18 Nov 2024 16:27:56 -0800 Message-ID: <20241119002815.600608-8-bvanassche@acm.org> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog In-Reply-To: <20241119002815.600608-1-bvanassche@acm.org> References: <20241119002815.600608-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Many but not all storage controllers require serialization of zoned writes. Introduce a new request queue limit member variable related to write serialization. 'driver_preserves_write_order' allows block drivers to indicate that the order of write commands is preserved per hardware queue and hence that serialization of writes per zone is not required if all pending writes are submitted to the same hardware queue. Cc: Damien Le Moal Cc: Hannes Reinecke Cc: Nitesh Shetty Cc: Christoph Hellwig Cc: Ming Lei Signed-off-by: Bart Van Assche --- block/blk-settings.c | 2 ++ include/linux/blkdev.h | 5 +++++ 2 files changed, 7 insertions(+) diff --git a/block/blk-settings.c b/block/blk-settings.c index f1d4dfdc37a7..329d8b65a8d7 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -633,6 +633,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, } t->max_secure_erase_sectors = min_not_zero(t->max_secure_erase_sectors, b->max_secure_erase_sectors); + t->driver_preserves_write_order = t->driver_preserves_write_order && + b->driver_preserves_write_order; t->zone_write_granularity = max(t->zone_write_granularity, b->zone_write_granularity); if (!(t->features & BLK_FEAT_ZONED)) { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index a1fd0ddce5cf..72be33d02d1f 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -397,6 +397,11 @@ struct queue_limits { unsigned int max_open_zones; unsigned int max_active_zones; + /* + * Whether or not the block driver preserves the order of write + * requests. Set by the block driver. + */ + bool driver_preserves_write_order; /* * Drivers that set dma_alignment to less than 511 must be prepared to