From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FDF6C761AF for ; Sun, 2 Apr 2023 12:40:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230271AbjDBMkx (ORCPT ); Sun, 2 Apr 2023 08:40:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbjDBMkv (ORCPT ); Sun, 2 Apr 2023 08:40:51 -0400 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 10EF2E1B6; Sun, 2 Apr 2023 05:40:48 -0700 (PDT) Received: from [2a02:8108:8980:2478:8cde:aa2c:f324:937e]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1pix0b-0005dt-9D; Sun, 02 Apr 2023 14:40:33 +0200 Message-ID: <3a2ca263-7f60-63d3-7f9a-208ab8197c07@leemhuis.info> Date: Sun, 2 Apr 2023 14:40:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.1 Subject: Re: [REGRESSION] CPUIDLE_FLAG_RCU_IDLE, blk_mq_freeze_queue_wait() and slow-stuck reboots Content-Language: en-US, de-DE To: Mark Rutland , Alexey Klimov Cc: peterz@infradead.org, draszik@google.com, peter.griffin@linaro.org, willmcvicker@google.com, mingo@kernel.org, ulf.hansson@linaro.org, tony@atomide.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, axboe@kernel.dk, alim.akhtar@samsung.com, regressions@lists.linux.dev, avri.altman@wdc.com, bvanassche@acm.org, klimova@google.com References: <20230314230004.961993-1-alexey.klimov@linaro.org> From: "Linux regression tracking #update (Thorsten Leemhuis)" Reply-To: Linux regressions mailing list In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1680439249;6dba8e56; X-HE-SMSGID: 1pix0b-0005dt-9D Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [TLDR: This mail in primarily relevant for Linux kernel regression tracking. See link in footer if these mails annoy you.] On 20.03.23 17:04, Mark Rutland wrote: > On Mon, Mar 20, 2023 at 01:52:47PM +0000, Mark Rutland wrote: >> On Tue, Mar 14, 2023 at 11:00:04PM +0000, Alexey Klimov wrote: >>> #regzbot introduced: 0c5ffc3d7b15 >>> #regzbot title: CPUIDLE_FLAG_RCU_IDLE, blk_mq_freeze_queue_wait() and slow-stuck reboots >>> >>> The upstream changes are being merged into android-mainline repo and at some >>> point we started to observe kernel panics on reboot or long reboot times. >> >> Where can I find the android-mainline repo, and which specific branch/commit >> from that repo is being merged in? > > I assume that was the android-mainline branch in: > > https://android.googlesource.com/kernel/common/ > > ... and I had a go with commit: > > 8338670fd5bdf8d7 ("Merge "Merge 36289a03bcd3 ("Merge tag 'v6.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6") into android-mainline" into android-mainline") > > ... as that was the commit immediately before your local revert: > > a32cec8e3f2253bc ("ANDROID: Revert "cpuidle, dt: Push RCU-idle into driver") > > Testing on Juno R2 with defconfig + PROVE_LOCKING=y + DEBUG_LOCKDEP=y, I cannot > reproduce the reboot issue; everything seems to work just fine. > > Can you say which config you're using? > > Just to check: are you using a pristine version of that tree, or do you have > any vendor hooks present? I note that there are special hooks added to the > cpuidle and PSCI code, and I can imagine those might expect the old behaviour > w.r.t. RCU and idle, so ruling those out would help. No reply to this since more than 10 days afaics, hence for now assuming that this is not really a regression. #regzbot inconclusive: another dev could not reproduce issue; reporter MIA and might have used a patched tree #regzbot ignore-activity Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) -- Everything you wanna know about Linux kernel regression tracking: https://linux-regtracking.leemhuis.info/about/#tldr That page also explains what to do if mails like this annoy you.