From nobody Sat Oct 4 16:09:10 2025 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (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 CE6BB2D47E9; Fri, 15 Aug 2025 08:10:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755245416; cv=none; b=TqjADBrnoBjcmH84VBQLqLGUTa+NhSuTwEyghR26s00rmfvxhCxx+T9QJ0sEHeDFRMcZq0bA+OUkVYm2xAfPRubfGD9Q+FcmH6AMtARsEIrFxBEtr0xGPzHAd6HXv+PWo2yJahR91Bb6wsRxBFAJn1LMQYCisP4yIbDBdE7XuxE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755245416; c=relaxed/simple; bh=SJDQlr8kYnUVXlqjG3XTlvRhDl2Ax+wgpIYELK54IoE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=LUlq68b666/jNiO1TSpGMVILE83HpT2Ze7v8L0CF4EWgRp7KrKxT4I29nPdGTTsFcHBg0A6optaWHLyK9EN7p5cakD806g8tg6PCtyXkyN2NtWZh5XMIaMjEgOkQjQF8qh6JUvBYRuiVbhDlYGF3/gY17dSSH7nrH64zzwGfeno= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.56 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4c3FCR6dnszKHMlk; Fri, 15 Aug 2025 16:10:11 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 3C3911A0F83; Fri, 15 Aug 2025 16:10:11 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgDHjxBc655o+xX_Dg--.53834S14; Fri, 15 Aug 2025 16:10:11 +0800 (CST) From: Yu Kuai To: axboe@kernel.dk, hare@suse.de, nilay@linux.ibm.com, ming.lei@redhat.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com, johnny.chenyi@huawei.com Subject: [PATCH 10/10] blk-mq: fix stale nr_requests documentation Date: Fri, 15 Aug 2025 16:02:16 +0800 Message-Id: <20250815080216.410665-11-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250815080216.410665-1-yukuai1@huaweicloud.com> References: <20250815080216.410665-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgDHjxBc655o+xX_Dg--.53834S14 X-Coremail-Antispam: 1UD129KBjvJXoW7KFWDCryfKr15Zw1xKFWfZrb_yoW8Xw1Dp3 yft39Fgwn5Zw18Wr10yay8tF13Aa95Aw43Jr4DKF1rtr98Awn29Fs2qr1rXF4xZrZ7AFWU urZ29r98Aa1qva7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUmS14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkE bVWUJVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67 AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI 42IY6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF 4lIxAIcVC2z280aVAFwI0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBI daVFxhVjvjDU0xZFpf9x0JUQFxUUUUUU= X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ Content-Type: text/plain; charset="utf-8" From: Yu Kuai The nr_requests documentation is still the removed single queue, remove it and update to current blk-mq. Signed-off-by: Yu Kuai --- Documentation/ABI/stable/sysfs-block | 14 ++++---------- 1 file changed, 4 insertions(+), 10 deletions(-) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stabl= e/sysfs-block index 0ddffc9133d0..0ed10aeff86b 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -603,16 +603,10 @@ Date: July 2003 Contact: linux-block@vger.kernel.org Description: [RW] This controls how many requests may be allocated in the - block layer for read or write requests. Note that the total - allocated number may be twice this amount, since it applies only - to reads or writes (not the accumulated sum). - - To avoid priority inversion through request starvation, a - request queue maintains a separate request pool per each cgroup - when CONFIG_BLK_CGROUP is enabled, and this parameter applies to - each such per-block-cgroup request pool. IOW, if there are N - block cgroups, each request queue may have up to N request - pools, each independently regulated by nr_requests. + block layer. Noted this value only represents the quantity for a + single blk_mq_tags instance. The actual number for the entire + device depends on the hardware queue count, whether elevator is + enabled, and whether tags are shared. =20 =20 What: /sys/block//queue/nr_zones --=20 2.39.2