From patchwork Fri Nov 8 19:36:22 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13868872 Received: from mx0a-00082601.pphosted.com (mx0a-00082601.pphosted.com [67.231.145.42]) (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 6E07A1AA1E2 for ; Fri, 8 Nov 2024 19:43:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.145.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731094986; cv=none; b=sbS1g5YJnB3WbFIv5vT4KjTGNPTAVWI30rLHJ4cRJiJEvuQeuQE3U+1I4VMTa10k6/GrOM4SpyLOXcIRylHA56UJRRlhw511CrImB8+vsmt19Sb4R2Pu1xZ7vc/kwyoJXboBqL90pjuEcZ22+AmNRiqcz2AkRkwjqFKnIsNtioc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731094986; c=relaxed/simple; bh=dghYSJUqrHxZgJ2S/xR790cnSvBl4HY9BwyiDV53ToA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=OCGwqlGWJzTv9n3wl67l8aGWxGN+avJTyAzv7MEjtbgR6hySgYG9sUh/jVsaCwhqpFvs0lnxQMPo9/kdtknhgU7PF1r52zEK2ZiowG5ESCV0s/SqJ9msjz9uK1LMcqM4mXVwIk79N7cCApqtpM+cHzMffBTjxOWf+angcLIqEG0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com; spf=pass smtp.mailfrom=meta.com; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b=XHHgGm7d; arc=none smtp.client-ip=67.231.145.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=meta.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b="XHHgGm7d" Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 4A8IANqP004929 for ; Fri, 8 Nov 2024 11:43:03 -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=EBbt1Sz3anE/DwELXc/1XodO6Fo/C1FtndRt7TOnDpo=; b=XHHgGm7d9IZ+ xPIQvIHhw2W7woWQpGp5uLIN1BQ998I7hfP3T3MlEkP1FQNrC72XCYKJam2OOCZA 4wjLdRhkyWxiQhuPnBs6aUvDL9cymh1zu1S49udr66QZ+9c1Pn/F2RHjZRycxt+S a6YtJ36+pTovLHK2Ejbd/0tz7pK8kko0mdw8VDOYZoxQln3lk1iSLC8oAmqIvmVp ENq8gnFwQ796cHoAVVgU3NjHB0NPv7Ckzc9BKVvfG7besnHfeO6S6G3gGqJXl3ms CtbSSbTXO3n5x4MFLrKRaij+U/BWhIT7AeF4xtrvMVPF/mRbWFiPjl/dQHw89/lM QE1Igv+Ifw== Received: from mail.thefacebook.com ([163.114.134.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 42sqpc0qye-6 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 08 Nov 2024 11:43:03 -0800 (PST) Received: from twshared29075.03.ash8.facebook.com (2620:10d:c085:108::150d) by mail.thefacebook.com (2620:10d:c08b:78::2ac9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Fri, 8 Nov 2024 19:43:00 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 7135514E3A02E; Fri, 8 Nov 2024 11:36:58 -0800 (PST) From: Keith Busch To: , , , , , CC: , , , , , Keith Busch Subject: [PATCHv11 2/9] block: introduce max_write_hints queue limit Date: Fri, 8 Nov 2024 11:36:22 -0800 Message-ID: <20241108193629.3817619-3-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241108193629.3817619-1-kbusch@meta.com> References: <20241108193629.3817619-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-ORIG-GUID: HTYwPIDQFdOxx1ywOrs4yefCEU8S-NJv X-Proofpoint-GUID: HTYwPIDQFdOxx1ywOrs4yefCEU8S-NJv 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 From: Keith Busch Drivers with hardware that support write streams need a way to export how many are available so applications can generically query this. Signed-off-by: Keith Busch --- Documentation/ABI/stable/sysfs-block | 7 +++++++ block/blk-settings.c | 3 +++ block/blk-sysfs.c | 3 +++ include/linux/blkdev.h | 12 ++++++++++++ 4 files changed, 25 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index 8353611107154..f2db2cabb8e75 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -506,6 +506,13 @@ Description: [RO] Maximum size in bytes of a single element in a DMA scatter/gather list. +What: /sys/block//queue/max_write_hints +Date: October 2024 +Contact: linux-block@vger.kernel.org +Description: + [RO] Maximum number of write hints supported, 0 if not + supported. If supported, valid values are 1 through + max_write_hints, inclusive. What: /sys/block//queue/max_segments Date: March 2010 diff --git a/block/blk-settings.c b/block/blk-settings.c index 5ee3d6d1448df..f9f831f104615 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -43,6 +43,7 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK; /* Inherit limits from component devices */ + lim->max_write_hints = USHRT_MAX; lim->max_segments = USHRT_MAX; lim->max_discard_segments = USHRT_MAX; lim->max_hw_sectors = UINT_MAX; @@ -544,6 +545,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->max_segment_size = min_not_zero(t->max_segment_size, b->max_segment_size); + t->max_write_hints = min(t->max_write_hints, b->max_write_hints); + alignment = queue_limit_alignment_offset(b, start); /* Bottom device has different alignment. Check that it is diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 0ef4e13e247d9..1925ea23bd290 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -104,6 +104,7 @@ QUEUE_SYSFS_LIMIT_SHOW(max_segments) 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_hints) QUEUE_SYSFS_LIMIT_SHOW(logical_block_size) QUEUE_SYSFS_LIMIT_SHOW(physical_block_size) QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors) @@ -457,6 +458,7 @@ QUEUE_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); 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_hints, "max_write_hints"); QUEUE_RW_LOAD_MODULE_ENTRY(elv_iosched, "scheduler"); QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); @@ -591,6 +593,7 @@ static struct attribute *queue_attrs[] = { &queue_max_discard_segments_entry.attr, &queue_max_integrity_segments_entry.attr, &queue_max_segment_size_entry.attr, + &queue_max_write_hints_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 1b51a7c92e9be..1477f751ad8bd 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -394,6 +394,8 @@ struct queue_limits { unsigned short max_integrity_segments; unsigned short max_discard_segments; + unsigned short max_write_hints; + unsigned int max_open_zones; unsigned int max_active_zones; @@ -1198,6 +1200,11 @@ static inline unsigned short queue_max_segments(const struct request_queue *q) return q->limits.max_segments; } +static inline unsigned short queue_max_write_hints(struct request_queue *q) +{ + return q->limits.max_write_hints; +} + static inline unsigned short queue_max_discard_segments(const struct request_queue *q) { return q->limits.max_discard_segments; @@ -1245,6 +1252,11 @@ static inline unsigned int bdev_max_segments(struct block_device *bdev) return queue_max_segments(bdev_get_queue(bdev)); } +static inline unsigned short bdev_max_write_hints(struct block_device *bdev) +{ + return queue_max_write_hints(bdev_get_queue(bdev)); +} + static inline unsigned queue_logical_block_size(const struct request_queue *q) { return q->limits.logical_block_size;