From nobody Thu Oct 2 07:45:16 2025 Received: from mail-pg1-f173.google.com (mail-pg1-f173.google.com [209.85.215.173]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4EE8226173 for ; Fri, 19 Sep 2025 02:56:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.173 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758250603; cv=none; b=q8uoWaGtwIVRe194t8EKlJdhX3lncPUY+RdvRlLcqMkiJXm17kM0STbyECxgfH+QtBDgqIZz/FaQcVvGehBg18kabqsWVbLMMmbrecjTMvVvhThgE3iZDwK3pVoQ3B1haQmfo3B/+yQySQbMfPWjPBQNCvqm/otEMB5hnuKR+0M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758250603; c=relaxed/simple; bh=xNC4+5vXuGIoP3AubYqeZ73I0t9q26/OKWO/Q7/2G4w=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=l2c6K4a3feDNfRSSek7jpDX1FQpOnoHsJPsqzDtR603pYccd1p4AQyj0nBwu0L25jLgUiPKPwYDu707L/c8HkuK6U3xWdf9WmaTkHasYw1vrCuEks4Vn/KHIsZou44y1jUh3cU1UMdcQ0v9SdYYErNGxDokThdMskrFE2oRDkdw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=F53VD4TQ; arc=none smtp.client-ip=209.85.215.173 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="F53VD4TQ" Received: by mail-pg1-f173.google.com with SMTP id 41be03b00d2f7-b5506b28c98so801127a12.1 for ; Thu, 18 Sep 2025 19:56:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758250601; x=1758855401; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ovDud+Upvoitt+mbnx9bJAksUkvB+hvEmFPUqVI4Vww=; b=F53VD4TQ7T1MFExVOJZH+AHAqsNVxQ4jMLo3r8Ii6q3JavLwt4sshQ3pxpboQEko3P WisUsce4WNVV9Fkn9G20N6fX/D4gusMOqo0Z8EFB8Mqrri+HYHMFjB3KxWJdOgHiC6tO 3M5RBfargClu2kK9ECpZkxANw70hZR5W3Na6DRJFQolUO3XrUHdiAznCsbpIBD20uuP3 M09yyvInrU4xMkmeMdCQ+ZfPAfhE1efOSbp/HKm0UUv2YCCi8+03qSQnmJkTTj8SwjRr BWDGc9+dz4oVUuOj27M9gETheGFO+u4uymBnoZguBoXqg2rdmuZYOv8AoeIVT8AxOaM2 R/BA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758250601; x=1758855401; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ovDud+Upvoitt+mbnx9bJAksUkvB+hvEmFPUqVI4Vww=; b=td404Ru+2+JPz/0TkbUWCnbey3IA8zMTh5MrETxLOBwAKSWAzriCkuuJxFF0OW1xUB TZ9vnm5TeEiDl7JCebftlHmYoMsZBKlqtBM7Ymp/vRc4Oo94172tmt08F61cyGmjbHU2 6fND9z/a9u9ObNdWiuMeHkkFKULh+G0FPgVigsDzfWJjvVdVePNXEHxN3/WkMzW1wGMe u9aC1YCMU3K5CrQ/m+tSSJJe7fhYZFqdrQX6OAWUxegXndOuaVR/iGEwsdafzdQcj7P+ T2bkzLyO+O1cWZzWxzNtNexdcYoogapQBmOWgct5dDUz1HE28OExt4Qlgz/Zg2IdgMcN qA+w== X-Forwarded-Encrypted: i=1; AJvYcCXZxggR1MHMnUanmO9MDZSHXg+OiF0wpnjwcazuXrcZ5ATOZl41QiTd4isI3j4dESTR6/ZCck6oJks3OJ4=@vger.kernel.org X-Gm-Message-State: AOJu0Ywi9h+tN9I5BXsKcI0jzmGlCK8XL87aRH+0qKE5y9RAmcXWtbH6 oGuLzVReTSXsyQn5lUY/kE5VxpOP/ma9R74nPROzy9NCQk7nluagGhF5Rtf9a9oL X-Gm-Gg: ASbGncvERTgFBRiV4Gix+ukyaAVanmFCIH169dt+gYzZ4RBcQBGvp4hhUb2n0s9vJxX K2qeMFjdKBNIf7ug4YLZAa3RFG4SMvYnPEQJ2bwIdEmC6GYOv/3H/LnNQEUwUtAjyKF5rKnpkJd akjpRr8j/idSs6d/Pi59IiNc+Z6b0n6297HpR+zxsbL8DBeQ0yP1T6I5qvAWX59GMjWvVjOdoPT IhYuY5oecXiiHiKjHom0I+4K0kJ6fHi2UeXvxAzuSJgavEqDUZCft72iVDxaUV4EAt/Rd3C4lJk 8NV080/fU6c+tdDaNjCeYYYS3qnuNmI/0xKugTkBv4zWuxxK058r1iUL4zgitgU6+kXl8DJ4pI8 S+Tw7h8TSN/X9mDvlE+loc2MCkKTyMx2uPgcPCkqmfXUD1l65 X-Google-Smtp-Source: AGHT+IFVASUMAByOUzxhSZOaC8eWyRPR1v9bRmGRUVLFszgWHEkfj3GYG9eKFdaTPNiM79F1DMo7BQ== X-Received: by 2002:a17:903:1b68:b0:264:5c06:4d7b with SMTP id d9443c01a7336-269ba51703cmr21441145ad.32.1758250601071; Thu, 18 Sep 2025 19:56:41 -0700 (PDT) Received: from localhost.localdomain ([116.128.244.171]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2698016c08dsm39504675ad.51.2025.09.18.19.56.38 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Thu, 18 Sep 2025 19:56:40 -0700 (PDT) From: chengkaitao To: axboe@kernel.dk Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, chengkaitao Subject: [PATCH] block/mq-deadline: adjust the timeout period of the per_prio->dispatch Date: Fri, 19 Sep 2025 10:56:13 +0800 Message-ID: <20250919025613.39771-1-pilgrimtao@gmail.com> X-Mailer: git-send-email 2.50.1 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 Content-Type: text/plain; charset="utf-8" From: chengkaitao Reference function started_after() Before modification: Timeout for dispatch{read}: 9.5s started_after - 0.5s < latest_start - 10s 9.5s < latest_start - started_after Timeout for dispatch{write}: 5s started_after - 5s < latest_start - 10s 5s < latest_start - started_after At this point, write requests have higher priority than read requests. After modification: Timeout for dispatch{read/write}: 5s prio_aging_expire / 2 < latest_start - started_after Signed-off-by: chengkaitao --- block/mq-deadline.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/block/mq-deadline.c b/block/mq-deadline.c index b9b7cdf1d3c9..f311168f8dfe 100644 --- a/block/mq-deadline.c +++ b/block/mq-deadline.c @@ -672,7 +672,8 @@ static void dd_insert_request(struct blk_mq_hw_ctx *hct= x, struct request *rq, =20 if (flags & BLK_MQ_INSERT_AT_HEAD) { list_add(&rq->queuelist, &per_prio->dispatch); - rq->fifo_time =3D jiffies; + rq->fifo_time =3D jiffies + dd->fifo_expire[data_dir] + - dd->prio_aging_expire / 2; } else { deadline_add_rq_rb(per_prio, rq); =20 --=20 2.50.1 (Apple Git-155)