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 4E204C6FD1D for ; Mon, 20 Mar 2023 09:06:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231165AbjCTJGZ (ORCPT ); Mon, 20 Mar 2023 05:06:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229808AbjCTJGW (ORCPT ); Mon, 20 Mar 2023 05:06:22 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 188BDEFAC; Mon, 20 Mar 2023 02:06:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=fBDCLgDROusp3YVfa1BNKVCbYNk4bPCVRJp8Y+Dd6zc=; b=gby7Pr28whMucYvxRxM4SHS0eO 2+2vZZCn9wr5Nr+NUf0HJG+p3y0Rc0gQIL6V6PHAe0yE0fvyauZ4XR8Awf34xEPxhBFAb9cxvkjkd f+gmd4f+bch/JHYauBVkD6r+P9Q3Kwhns/MP1Fro8TaAbG8j4oXv1MqFxr2KCGb2V6Sdkofl5X+3T 6rPS9liJSyXmAaf6xJ6x5wcRGkomuIExJbtj73zquzNHeSBA/cHRKrdSQO8h4gbi2mebok5kvT1wB 3+xWdXxD/Mhke27MpLYh0lx6c+5bM7NTjwW+tCHrqp7AP9TvzCfU5bPZOlE5WYopZPuqjpHVgUtIk vPfg6BZA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1peBSq-000rfv-Os; Mon, 20 Mar 2023 09:06:00 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E171A300392; Mon, 20 Mar 2023 10:05:58 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 787CD209F7546; Mon, 20 Mar 2023 10:05:58 +0100 (CET) Date: Mon, 20 Mar 2023 10:05:58 +0100 From: Peter Zijlstra To: Alexey Klimov Cc: 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 Subject: Re: [REGRESSION] CPUIDLE_FLAG_RCU_IDLE, blk_mq_freeze_queue_wait() and slow-stuck reboots Message-ID: <20230320090558.GF2194297@hirez.programming.kicks-ass.net> References: <20230314230004.961993-1-alexey.klimov@linaro.org> <20230315111606.GB2006103@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Mar 17, 2023 at 02:11:25AM +0000, Alexey Klimov wrote: > On Wed, 15 Mar 2023 at 11:16, Peter Zijlstra wrote: > > > > > > (could you wrap your email please) > > Ouch. Sorry. > > > 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. > > > > On what hardware? I find it somewhat hard to follow this DT code :/ > > Pixel 6. What actual cpuidle driver is that thing using? Is there any out-of-tree code involved? Mark tells me anything arm64 should be using PSCI, so let me to stare hard at that again.