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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 D3416C79F99 for ; Mon, 7 Sep 2026 21:12:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=1Nq/CDy5eN1RWcjexAvJnY1EZmo2i1apDparjrqIaeU=; b=01+d6o9pyrmUMBncwHW4WYsVs6 e4u40xTAxlO1o1N/KA3upowcAlgfEYwvWR8zBUgPRbHi/DfM8o5ncM6EBrK41DJGKJDXaupZzkPIv CFVo0eMUBsvTt+wnGMI2C46BIdL/PgoQPpttBuoiH89yKPHHEOrpCluhTrTHx6fqsod4ykFXOuYXp 4DaZlpoJr5F33uFBeXqAftqODCCVc7mbxBfzq6vwMZZ2YJV6ThxXcuLSKlVXGXAh2rfhanJs5nDQh 5z75JV9C0rgK+nIHsv1wdY6S7X74uw0yxGww7AfQQFE4sYNdiTSOLWXrbSj5TtOHEZAHUv49U+eRq 6uhro4lw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3gds-00000007kZ0-0oFl; Mon, 07 Sep 2026 21:12:40 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x3gdp-00000007kYn-27eW for linux-arm-kernel@lists.infradead.org; Mon, 07 Sep 2026 21:12:39 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id F032543BD6; Mon, 7 Sep 2026 21:12:36 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D1C421F00A3A; Mon, 7 Sep 2026 21:12:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788815556; bh=1Nq/CDy5eN1RWcjexAvJnY1EZmo2i1apDparjrqIaeU=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=WWZiaTDwiVlQM0e9x7VrTL5KQeW7aBrDMJYJfILd5eYWhb/1qRKc0kz7g8gOF3umv UeJbFvCEFxUzDm5P8fNSmFdoQmtROpavrVzjoP8bmtd9p4RO/ui6Aaj6lGYuHfpJJw x//8HYNaOgU7wTZmBdweTpPmGRWQzqpHKOhR2c1XKkMZQtTkIJ8gwb3Uxf0Gn7zgZp qxCqcjeddfQx6BmxyOt2KQLrQAI9kC2cian7LL+JQp+NiQ7rhPjdS7dOp//5CM2m00 e+R1oIOxeAEgWb3V9P4NhQZwUpT/O/ksD+cAZrhgeJ35J7h8PXl6uKsOd1uATehQl5 lZhOgF4I2g06g== Received: from sofa.misterjones.org ([185.219.108.64] helo=lobster-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1x3gdm-00000005wXM-3R5X; Mon, 07 Sep 2026 21:12:34 +0000 Date: Mon, 07 Sep 2026 22:15:09 +0100 Message-ID: <87ld9c4vc2.wl-maz@kernel.org> From: Marc Zyngier To: Abel Vesa Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Raviteja Laggyshetty , Konrad Dybcio , Abel Vesa , Bjorn Andersson , Mostafa Saleh Subject: Re: [PATCH] interconnect: qcom: icc-rpmh: Add opt-out parameter for QoS settings In-Reply-To: References: <20260907171729.1735641-1-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: abel.vesa@oss.qualcomm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, raviteja.laggyshetty@oss.qualcomm.com, konrad.dybcio@oss.qualcomm.com, abelvesa@kernel.org, andersson@kernel.org, smostafa@google.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, 07 Sep 2026 21:21:44 +0100, Abel Vesa wrote: > > On 26-09-07 18:17:29, Marc Zyngier wrote: > > Recent addition of QoS configuration to the X1 variants resulted in > > systems that spontaneously reset at boot time or under load. > > > > Given that this is both very unpleasant and hard to debug, give the > > affected user the option to survive such event with a module parameter. > > > > Passing "icc_rpmh.enable_qos=0" to the kernel command-line will skip the > > offending QoS setup. > > > > Lets not start doing this, please. > > Can we figure out which platform deosn't work and then maybe we can > add a quirk in DT per platform? We have at least 3 machines that are dysfunctional since [1] was merged (mini-x, sp12 and devkit). Probably some more, but I'm not going to be the one doing a survey. What really should happen is [1] to be reversed until QC figures out a set of parameters that actually works, instead of making this platform even more unreliable than it already is. Just like [2] should have been reverted. Until then, we'll have to paper over this stuff. M. [1] https://lore.kernel.org/all/20260527-x1e80100_qos-v2-2-305c6539e6d2@oss.qualcomm.com [2] https://lore.kernel.org/all/20260203063244.1498699-1-xin.liu@oss.qualcomm.com -- Jazz isn't dead. It just smells funny.