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 X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 99082C4338F for ; Tue, 10 Aug 2021 17:09:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7915960EBB for ; Tue, 10 Aug 2021 17:09:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231742AbhHJRJ5 (ORCPT ); Tue, 10 Aug 2021 13:09:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229474AbhHJRJ4 (ORCPT ); Tue, 10 Aug 2021 13:09:56 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44D16C0613C1 for ; Tue, 10 Aug 2021 10:09:34 -0700 (PDT) From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1628615372; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qzC/LvzQoV4rEBw81fDUV8N2YJ6GodUbmge4n5nlRYY=; b=PfRonojs7JWe7xu4IW2sSftyh4m0Y4rJryqyIu35UQtua2i/0v0n6i5SmnI5+K6O48R7I6 mngicddYeveWzX0dWzQam7AB3JoLwM9vJKOKbfv2mvMQ9SJanaaKgk87LabcMCS+0haP+Y aXmtgVfBzeiEZnTUgTIZMvBniBEFMN8nSm7/53C9d6dIeBM4JfU2tsvNfGob1rtMuPkSTa d/3FQf1IHT43P4ABi+wQ9b/d3FnKIDJ49NRj24g3SytwaEUTMIzPwYTtCZEF+8Cd691pxo fUu7jZ1uCoGR+tBfpQ6aMHotinbnYdBX1h7Ii5QFtPMqQo+vHNf7WKYntRsiuQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1628615372; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qzC/LvzQoV4rEBw81fDUV8N2YJ6GodUbmge4n5nlRYY=; b=7/fFI4h7TiEvKt/nJP4QMq6cyM7iMsOhGe1NAbPp80ZaFkExmwgydp0N5sPkxp5GEVjOvj jE20Smgq7jscJ6Aw== To: blinkin@email.it Cc: linux-kernel Subject: Re: Bug report for kernel v4.15-rc8+ In-Reply-To: <217397770.2008922.1628604301644.JavaMail.zimbra@email.it> References: <629765464.1655403.1628264743080.JavaMail.zimbra@email.it> <87tujxssp2.ffs@tglx> <217397770.2008922.1628604301644.JavaMail.zimbra@email.it> Date: Tue, 10 Aug 2021 19:09:32 +0200 Message-ID: <877dgtql9v.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 10 2021 at 16:05, blinkin@email.it wrote: > The general symptom is a slow and unresponsive system (e.g. on gnome > there's a delay before displaying typed characters, up to 3-5 > seconds. Animations are jittering, mouse clicks sometimes are missed). > 3D games are now impossible to play due to poor performance. > > System feels as if the CPU is always busy (htop shows one core at ~ > 90% most of the time both with and without the workaround, not sure > it's correlated) That's definitely wrong. What is consuming CPU time? > It's running OpenSuse Leap 15.2 (the bug came out when upgrading from > 15.1, thus going from kernel 4.12 to 5.3) I suspect the same bug is > responsible for making me switch to suse after failing to upgrade > debian from 9 (kernel 4.9) to 10 (kernel 4.19) > > The workaround is to pass irqaffinity=0 on boot. > > Attached: dmesg output with and without the irqaffinity parameter, > lspci output, /proc/cpuinfo contents. > > Let me know what else is needed. 1) You're booting with an out of tree module: > [ 17.080069] vboxdrv: loading out-of-tree module taints kernel. Please reproduce without this. 2) Please provide information what is consuming 90% of a CPU 3) Please provide the output of /proc/interrupts for both boot scenarios Take a snapshot right after boot and another one a minute later. Thanks, tglx