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 lists.zx2c4.com (lists.zx2c4.com [165.227.139.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 23B95C433EF for ; Wed, 6 Jul 2022 18:09:55 +0000 (UTC) Received: by lists.zx2c4.com (OpenSMTPD) with ESMTP id a1d5bcf5; Wed, 6 Jul 2022 18:09:54 +0000 (UTC) Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [2a00:1450:4864:20::236]) by lists.zx2c4.com (OpenSMTPD) with ESMTPS id 6f5d1f5d (TLSv1.3:AEAD-AES256-GCM-SHA384:256:NO) for ; Wed, 6 Jul 2022 18:09:53 +0000 (UTC) Received: by mail-lj1-x236.google.com with SMTP id y18so8576591ljj.6 for ; Wed, 06 Jul 2022 11:09:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:date:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to; bh=0A598iVSKLysRfv2sRXRDO6tMHET5VOceIuNiuD58/Y=; b=RCq4RtcmZ8gfFAM/viGpnHBX7b6YJzB9+TxM8v7brC+iSNmhLCX/k75uH2OP1T7/a8 bS8oBg/Viter1LXQ7eHV8v2nY5lEBb4Rv3iw0GJ1bZSN0TQm1ffZiqD4NXwPV4veIWVe XB1ZUQDinD2dOVWeGYnETXE+m19508Y6Ozq/PcicZqcTgtPcNoKDObAq4iyCDwVYYrq8 RIkiNu3SHadjcqE0XTgclmFT9xK2C1KbizaIxzPjJEENCITLg1FV+XIOB6MZfdvVcnWl 4SmvktWXdPoqTf+km4bX9tnC7oUfSZzFD/c6028NywVvCMaAdd7bZ50ArulnCB4I/0vw Oqrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:date:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=0A598iVSKLysRfv2sRXRDO6tMHET5VOceIuNiuD58/Y=; b=AeOiG/Y+AclevBWifFO12Ox2f0vHsSw9g+P4uy0o66EuXJXUoeb1cJzA5rThnBaSxa emk2jHy/vIawBpX1V0pwytgbAV7HmbnQ54A90Fhh3VqBDMx5GyVOUGgzrUlhO1fDilEW /GSaQsa9GETTIKxzGqv6ezPT6pYuHCrrXO9mJfcyCnORD9Sz2ln9XLA0YGSaXxfcrMGY WO5EsDAZPa64bbvY6u3ztFc7wMZsGY7kJRIdXMdKpTKZ3o8zzBOCPCjXkp52KdVxvUJK 8tFL3JWRF+3u9xuhuT1lGTbiXb0vZsL/uhKtGD2lz2a1SiR3z7CGsekaV1JqaF8u87np Mk5g== X-Gm-Message-State: AJIora/UhnDzUBinIFykFImO73MLVgL2R56AUtGvoE0mFzG1XAkmsJTW EFhK/AheHuUFJQVRSZn/NnE= X-Google-Smtp-Source: AGRyM1tVGz9tZcQBzGZVPndJH1FRtpjeuQp7KHQvu/ovYzoH3JzfCWBp9GXAxjZSPbrMCtpzNemUuA== X-Received: by 2002:a2e:b209:0:b0:25a:705d:c4ba with SMTP id l9-20020a2eb209000000b0025a705dc4bamr22643914ljm.468.1657130992430; Wed, 06 Jul 2022 11:09:52 -0700 (PDT) Received: from pc638.lan ([155.137.26.201]) by smtp.gmail.com with ESMTPSA id n24-20020a05651203f800b0047863e5649esm6413063lfq.86.2022.07.06.11.09.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jul 2022 11:09:51 -0700 (PDT) From: Uladzislau Rezki X-Google-Original-From: Uladzislau Rezki Date: Wed, 6 Jul 2022 20:09:49 +0200 To: "Paul E. McKenney" Cc: Uladzislau Rezki , Christian =?utf-8?B?S8O2bmln?= , "Alex Xu (Hello71)" , wireguard@lists.zx2c4.com, "Jason A. Donenfeld" , Joel Fernandes , Greg Kroah-Hartman , Xinhui.Pan@amd.com, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, Suren Baghdasaryan , rcu@vger.kernel.org, Hridya Valsaraju , Arve =?utf-8?B?SGrDuG5uZXbDpWc=?= , Theodore Ts'o , alexander.deucher@amd.com, Todd Kjos , uladzislau.rezki@sony.com, Martijn Coenen , Christian Brauner Subject: Re: CONFIG_ANDROID (was: rcu_sched detected expedited stalls in amdgpu after suspend) Message-ID: References: <20220627204139.GL1790663@paulmck-ThinkPad-P17-Gen-1> <1656379893.q9yb069erk.none@localhost> <20220628041252.GV1790663@paulmck-ThinkPad-P17-Gen-1> <1656421946.ic03168yc3.none@localhost> <20220628185437.GA1790663@paulmck-ThinkPad-P17-Gen-1> <1656443915.mdjoauhqe0.none@localhost> <79c6ad70-47d9-47fe-4bb4-33fcf356dd37@amd.com> <20220706175836.GI1790663@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20220706175836.GI1790663@paulmck-ThinkPad-P17-Gen-1> X-BeenThere: wireguard@lists.zx2c4.com X-Mailman-Version: 2.1.30rc1 Precedence: list List-Id: Development discussion of WireGuard List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: wireguard-bounces@lists.zx2c4.com Sender: "WireGuard" On Wed, Jul 06, 2022 at 10:58:36AM -0700, Paul E. McKenney wrote: > On Wed, Jul 06, 2022 at 07:48:20PM +0200, Uladzislau Rezki wrote: > > Hello. > > > > On Mon, Jul 04, 2022 at 01:30:50PM +0200, Christian König wrote: > > > Hi guys, > > > > > > Am 28.06.22 um 22:11 schrieb Uladzislau Rezki: > > > > > Excerpts from Paul E. McKenney's message of June 28, 2022 2:54 pm: > > > > > > All you need to do to get the previous behavior is to add something like > > > > > > this to your defconfig file: > > > > > > > > > > > > CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=21000 > > > > > > > > > > > > Any reason why this will not work for you? > > > > > > sorry for jumping in so later, I was on vacation for a week. > > > > > > Well when any RCU period is longer than 20ms and amdgpu in the backtrace my > > > educated guess is that we messed up some timeout waiting for the hw. > > > > > > We usually do wait a few us, but it can be that somebody is waiting for ms > > > instead. > > > > > > So there are some todos here as far as I can see and It would be helpful to > > > get a cleaner backtrace if possible. > > > > > Actually CONFIG_ANDROID looks like is going to be removed, so the CONFIG_RCU_EXP_CPU_STALL_TIMEOUT > > will not have any dependencies on the CONFIG_ANDROID anymore: > > > > https://lkml.org/lkml/2022/6/29/756 > > But you can set the RCU_EXP_CPU_STALL_TIMEOUT Kconfig option, if you > wish. Setting this option to 20 will get you the behavior previously > obtained by setting the now-defunct ANDROID Kconfig option. > Right. Or over boot parameter. So for us it is not a big issue :) -- Uladzislau Rezki