From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DE0E8606A31E for ; Fri, 23 Oct 2026 08:03:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=z3lRk92n; dkim=pass (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=lvNBtNFG 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-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Unsubscribe-Post: List-Owner; bh=0fTzlDvfAp5L1yBHP6Hrs7VySIWJ+6xVLe/GeeedsiY=; b=z3lRk92nIgA1W6 /XCMg6u6ubNGhVzdfB/3NlkR0sFoy/uZLSAyrm7IR2KegVHDr+vYmgQ1BxQ3D6jamZuqcltkpcqab VZGnHOrndQ70VKFd8ZV+XgPhm5LOgQ5dV4dOeEHS9hSyl+2g2zEUahilXvX0BPxggZoXUSDNppkdc T2rFJjCqJD9fsXV7r/WR3129Y6Zu+YMv0V7edcaGp/F8WoXYZXh6L4dvjuSAA7T4eD3xwySptRr2u Jx9FV1H2fkqE2ri7PSm4fRVqJiwuPRKJ5JJjXLqXnuMrZV7skSK6MFytcvat0qCv+2zxroNjPVvuZ a/BFous+MZoi0NTVQzwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKAF7-0000000FqoZ-1n7c; Fri, 23 Oct 2026 08:03:13 +0000 Received: from out30-133.freemail.mail.aliyun.com ([115.124.30.133]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xKAEz-0000000FqiX-3J8n for linux-nvme@lists.infradead.org; Fri, 23 Oct 2026 08:03:07 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1792742582; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=0fTzlDvfAp5L1yBHP6Hrs7VySIWJ+6xVLe/GeeedsiY=; b=lvNBtNFG493Ol1ANM5FUPPYQaN635Zg2/4fwUG+nXASvzzfF/7AYh3vJo3QyeNWUOeY5Arbiysc/5QMoH718vHTrWnOctRht4kIbrwqM3U5H/s9Utfyy92YkTfdtQKPBUs3sOscfm1//+c5ZE1Fe1lT4XmhsAaBKSKGYGeD5WjA= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R751e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037033178;MF=kanie@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0XDLNnFV_1792742581; Received: from localhost(mailfrom:kanie@linux.alibaba.com fp:SMTPD_---0XDLNnFV_1792742581 cluster:ay36) by smtp.aliyun-inc.com; Fri, 23 Oct 2026 16:03:01 +0800 From: Guixin Liu To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Nilay Shroff , Daniel Wagner , Hannes Reinecke Cc: linux-nvme@lists.infradead.org Subject: [PATCH 02/11] block: add bdev_write_stream_granularity() Date: Fri, 23 Oct 2026 16:02:42 +0800 Message-ID: <20261023080251.2606443-3-kanie@linux.alibaba.com> X-Mailer: git-send-email 2.43.7 In-Reply-To: <20261023080251.2606443-1-kanie@linux.alibaba.com> References: <20261023080251.2606443-1-kanie@linux.alibaba.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261023_010306_018648_FCF4007A X-CRM114-Status: GOOD ( 10.84 ) X-Spam-Score: -17.6 (-----------------) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-nvme" X-Spam-Status: No, score=-26.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 The write stream granularity queue limit is readable through the queue_limits structure only. Add a block device accessor next to bdev_max_write_streams(), so that holders of a block device can read it without going through the request queue. Signed-off-by: Guixin Liu --- include/linux/blkdev.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 4f7905c3412b8..6eca09058dec6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1307,6 +1307,14 @@ static inline unsigned short bdev_max_write_streams(struct block_device *bdev) return bdev_limits(bdev)->max_write_streams; } +static inline unsigned int +bdev_write_stream_granularity(struct block_device *bdev) +{ + if (bdev_is_partition(bdev)) + return 0; + return bdev_limits(bdev)->write_stream_granularity; +} + static inline unsigned queue_logical_block_size(const struct request_queue *q) { return q->limits.logical_block_size; -- 2.43.7