From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1F81DE77179 for ; Fri, 6 Dec 2024 22:25:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:CC:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=H1449KeqBHH2qLyX/UaGXiOFOGfVyFVyzOCCtWJaXls=; b=ec0l+QtHWFv6ybkVsj8nxr91l3 /5vaRi6eUW/KVIbP8TVkSjxz/w1kDojG4y6qSvnhxiGqriFoVYOyGwqVaaoUepISO7evNiQ5WXjjS UvSVJ/fQNFCmdmqx7m3Kgi4/WxPPjWYIydD+eDaD9tql05sJn6T4bUgp/Ql4OyELSlZzWP1AOFJOX PSFeHeNSRZ7xeWJLZK/nzhwJh6JLCjKDm3yLV8O9lfuWiqsIDJpaRRgzjzsmzv4YR+AldIe9wr6cc VfDEfAiqsOQ6bHm6edBrD8A2R9VNNrdo0tLaRwzY461Ld0CCRinBlTQU9lmNwa63mnMX5Wt4vyqCP /N9Mui/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tJglL-00000002tpU-3BSE; Fri, 06 Dec 2024 22:25:27 +0000 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tJgjx-00000002tUw-0mTn for linux-nvme@lists.infradead.org; Fri, 06 Dec 2024 22:24:02 +0000 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4B6LhG8n032187 for ; Fri, 6 Dec 2024 14:24:00 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=s2048-2021-q4; bh=H1449KeqBHH2qLyX/UaGXiOFOGfVyFVyzOCCtWJaXls=; b=mCc/ziz1dBfW 1J1Purn95Rx/JCJjC75pAXd9cn0heK+ehBEeStpJdJjZtZlEC9EHehNvxzvHmpve G2ePNw3J+n0nxJWISLhrAmuKgTDbUuQqyVUcCEh9TOPqlzfwLIrqOBqNZdxmbwT4 UiJvWT9lcXaeHO8CM+J7ugANhAowBxQQVgtsh3Dgdgp2ogZegM9zARKIFCsc2Wde AgtfD0q3DUgYByOLLnqd2eUsT+DVwdCUXWj45UJ7RfhLlM1hWFPNEa/mtL14Kvf6 RbVo2M5V3Bykf2HGRFlrWS6vxRtL1Oku7uS+86ImhT1Gq6LeBboAjMsL4lLLsmeA 2nFiq2TDDQ== Received: from mail.thefacebook.com ([163.114.134.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 43bx1gmyam-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 06 Dec 2024 14:23:59 -0800 (PST) Received: from twshared11082.06.ash8.facebook.com (2620:10d:c085:108::150d) by mail.thefacebook.com (2620:10d:c08b:78::c78f) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Fri, 6 Dec 2024 22:23:57 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 2AB7F15B8CB79; Fri, 6 Dec 2024 14:18:27 -0800 (PST) From: Keith Busch To: , , , , , CC: , , , , Keith Busch Subject: [PATCHv12 05/12] block: introduce a write_stream_granularity queue limit Date: Fri, 6 Dec 2024 14:17:54 -0800 Message-ID: <20241206221801.790690-6-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241206221801.790690-1-kbusch@meta.com> References: <20241206221801.790690-1-kbusch@meta.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-FB-Internal: Safe Content-Type: text/plain X-Proofpoint-ORIG-GUID: ywD3kZPc9oQcS7afZyNVyPeHjFgsL9P_ X-Proofpoint-GUID: ywD3kZPc9oQcS7afZyNVyPeHjFgsL9P_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-05_03,2024-10-04_01,2024-09-30_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241206_142401_356435_8CF6FF72 X-CRM114-Status: GOOD ( 11.24 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Christoph Hellwig Export the granularity that write streams should be discarded with, as it is essential for making good use of them. Signed-off-by: Christoph Hellwig Signed-off-by: Keith Busch --- Documentation/ABI/stable/sysfs-block | 8 ++++++++ block/blk-sysfs.c | 3 +++ include/linux/blkdev.h | 7 +++++++ 3 files changed, 18 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/sta= ble/sysfs-block index f67139b8b8eff..c454c68b68fe6 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -514,6 +514,14 @@ Description: supported. If supported, valid values are 1 through max_write_streams, inclusive. =20 +What: /sys/block//queue/write_stream_granularity +Date: November 2024 +Contact: linux-block@vger.kernel.org +Description: + [RO] Granularity of a write stream in bytes. The granularity + of a write stream is the size that should be discarded or + overwritten together to avoid write amplification in the device. + What: /sys/block//queue/max_segments Date: March 2010 Contact: linux-block@vger.kernel.org diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index c514c0cb5e93c..525f4fa132cd3 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -105,6 +105,7 @@ QUEUE_SYSFS_LIMIT_SHOW(max_discard_segments) QUEUE_SYSFS_LIMIT_SHOW(max_integrity_segments) QUEUE_SYSFS_LIMIT_SHOW(max_segment_size) QUEUE_SYSFS_LIMIT_SHOW(max_write_streams) +QUEUE_SYSFS_LIMIT_SHOW(write_stream_granularity) QUEUE_SYSFS_LIMIT_SHOW(logical_block_size) QUEUE_SYSFS_LIMIT_SHOW(physical_block_size) QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors) @@ -448,6 +449,7 @@ QUEUE_RO_ENTRY(queue_max_segments, "max_segments"); QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size"); QUEUE_RO_ENTRY(queue_max_write_streams, "max_write_streams"); +QUEUE_RO_ENTRY(queue_write_stream_granularity, "write_stream_granularity= "); QUEUE_RW_LOAD_MODULE_ENTRY(elv_iosched, "scheduler"); =20 QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); @@ -583,6 +585,7 @@ static struct attribute *queue_attrs[] =3D { &queue_max_integrity_segments_entry.attr, &queue_max_segment_size_entry.attr, &queue_max_write_streams_entry.attr, + &queue_write_stream_granularity_entry.attr, &queue_hw_sector_size_entry.attr, &queue_logical_block_size_entry.attr, &queue_physical_block_size_entry.attr, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ce2c3ddda2411..7be8cc57561a1 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -400,6 +400,7 @@ struct queue_limits { unsigned short max_discard_segments; =20 unsigned short max_write_streams; + unsigned int write_stream_granularity; =20 unsigned int max_open_zones; unsigned int max_active_zones; @@ -1249,6 +1250,12 @@ static inline unsigned short bdev_max_write_stream= s(struct block_device *bdev) return bdev_limits(bdev)->max_write_streams; } =20 +static inline unsigned int +bdev_write_stream_granularity(struct block_device *bdev) +{ + return bdev_limits(bdev)->write_stream_granularity; +} + static inline unsigned queue_logical_block_size(const struct request_que= ue *q) { return q->limits.logical_block_size; --=20 2.43.5