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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 07EA8C32789 for ; Sun, 4 Nov 2018 10:21:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B72842082A for ; Sun, 4 Nov 2018 10:21:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B72842082A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729289AbeKDTeT (ORCPT ); Sun, 4 Nov 2018 14:34:19 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:60970 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726556AbeKDTeT (ORCPT ); Sun, 4 Nov 2018 14:34:19 -0500 Received: from p5492fe24.dip0.t-ipconnect.de ([84.146.254.36] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1gJFVW-0004Ww-AJ; Sun, 04 Nov 2018 11:19:50 +0100 Date: Sun, 4 Nov 2018 11:19:49 +0100 (CET) From: Thomas Gleixner To: Holger Schurig cc: linux-kernel@vger.kernel.org, Ingo Molnar , x86@kernel.org Subject: Re: BUG: "do_IRQ: 0.39 No irq handler for vector" from a 16550 port In-Reply-To: <87h8gzfr2p.fsf@gmail.com> Message-ID: References: <87k1lvg2z4.fsf@gmail.com> <87h8gzfr2p.fsf@gmail.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2 Nov 2018, Holger Schurig wrote: > I said that kernel 4.9 doesn't show the issue. The same was for later > kernels up to 4.13. > > I had a compilation issue with 4.14 (which I later solved, something > unrelated with tools/objcopy when compiling for a different > architecture), so I did a git bisect between v4.13 and v4.15. This is > the outcome: > > git bisect bad 464d12309e1b5829597793db551ae8ecaecf4036 > # first bad commit: [464d12309e1b5829597793db551ae8ecaecf4036] x86/vector: Switch IOAPIC to global reservation mode Which is not surprising because the old model just hid the issue of interrupts which came in after the interrupt had been torn down. I have no idea what causes this, but it seems to be related to the particular hardware/BIOS combination. Thanks, tglx