From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.4]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A2D581C6A3; Sat, 30 Nov 2024 06:11:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=117.135.210.4 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732947065; cv=none; b=J7HAcggxkuaTgfUtJQ3/Vyx/vo6J9KenfyPulpe8pjEqxGiWteYlkjk9krQhRMM6DYui4j6VnVOEBgx2YSNo6y06vgVVm+GbIEuoZKUf0HZNi+xaZGPAEO+9I8A+7QMX5pIB7w5DCS8vYLv7kkkz+E83CPZ/ytQR2hLfXnP8m+Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732947065; c=relaxed/simple; bh=x5pvY7QeB2hU6DCrlLsOPv0rtVWwVD5kjFqKWvAwFQQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=lEfrbeP00FU7s4b0WUQawbQ3H284qZSIDYDsJW/4cMHITn+wOb3V3yea+A9Q7JhlA5FyPNkdLSNWu8Yw+SF7m3UIJd+D6Ypu/gUaV9DliWu5yMYEE5yHs3J7zMR55PgDLRnQE2cxDrTN7ql+EpxSVbdvgOi8WyhBbQHMI+VyfVM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=R43Mfy4g; arc=none smtp.client-ip=117.135.210.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="R43Mfy4g" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=gIoTD 7f1fIu8H1dclXCi7rJHwAV5+VzXKP6fC6h8sxw=; b=R43Mfy4gF4ANTOXrT84bG NrqqurkZkj/JiCQhjbPntv9zzBxcQuMS38XcGbjNyK01D9akX+HB+Dmq8asfUW4w QN8VEpbJSIKV8QcmsauN/Onj83X0uNfYl4otmH1VAp1FDl7IZZeoWSrm4B+DTXGC crOwUk6edPh/7JkeWkmvEc= Received: from localhost.localdomain (unknown [111.35.188.140]) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wD3XzItrEpnUFMcCA--.50644S4; Sat, 30 Nov 2024 14:10:06 +0800 (CST) From: David Wang <00107082@163.com> To: chris.bainbridge@gmail.com Cc: axboe@kernel.dk, bvanassche@acm.org, hch@lst.de, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, semen.protsenko@linaro.org Subject: Re: [REGRESSION] ioprio performance hangs, bisected Date: Sat, 30 Nov 2024 14:09:49 +0800 Message-Id: <20241130060949.122381-1-00107082@163.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wD3XzItrEpnUFMcCA--.50644S4 X-Coremail-Antispam: 1Uf129KBjvdXoWrtw48AF4kCF43GF48uF48Zwb_yoW3Jwc_ZF W0qF9rtFyFgrsxKrnxJ3WxZFnI9r93W3Z3X3y7GFsrJry3WFWq9an5ZFW8Awnrt3yUAa93 Crsaqa4jqryS9jkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRiqjgDUUUUU== X-CM-SenderInfo: qqqrilqqysqiywtou0bp/1tbiqRqnqmdKpauZbwAAsr Would fix/revert reach 6.13-rc1? I think this regression has significant nagative impact on daily usage. From time to time, my system would *stuck* for seconds, sometimes even when just `cat` some small file it would take seconds, and once, my desktop failed to resume from a suspend, I had to power cycle the system; Polling /proc/diskstats, I noticed Block-IO read latency, delta(# of milliseconds spent reading)/delta(# of reads completed), is very high, ~200ms average, and frequently reaches 10s. (Strangely block-io write latency seems normal.) My bisect also land on this commit, revert or apply this patch would fix it. Kind of think that 6.13-rc1 would be very unpleseant to use without a fix/revert for this. David