From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gDEb4-0005Pg-WB for kexec@lists.infradead.org; Thu, 18 Oct 2018 20:08:44 +0000 Subject: Re: [PATCH 3/3] x86/quirks: Add parameter to clear MSIs early on boot References: <20181018183721.27467-1-gpiccoli@canonical.com> <20181018183721.27467-3-gpiccoli@canonical.com> From: Sinan Kaya Message-ID: <6fd4e2d2-c0ac-b26d-9a14-0379b4421679@kernel.org> Date: Thu, 18 Oct 2018 16:08:27 -0400 MIME-Version: 1.0 In-Reply-To: <20181018183721.27467-3-gpiccoli@canonical.com> Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: "Guilherme G. Piccoli" , linux-pci@vger.kernel.org, kexec@lists.infradead.org, x86@kernel.org Cc: cascardo@canonical.com, andi@firstfloor.org, bhe@redhat.com, lukas@wunner.de, shan.gavin@linux.alibaba.com, kernel@gpiccoli.net, linux-kernel@vger.kernel.org, gavin.guo@canonical.com, ddstreet@canonical.com, mingo@redhat.com, bp@alien8.de, billy.olsen@canonical.com, mfo@canonical.com, hpa@zytor.com, bhelgaas@google.com, jay.vosburgh@canonical.com, tglx@linutronix.de, dyoung@redhat.com, fabiomirmar@canonical.com, vgoyal@redhat.com On 10/18/2018 2:37 PM, Guilherme G. Piccoli wrote: > We observed a kdump failure in x86 that was narrowed down to MSI irq > storm coming from a PCI network device. The bug manifests as a lack of > progress in the boot process of kdump kernel, and a flood of kernel > messages like: > > [...] > [ 342.265294] do_IRQ: 0.155 No irq handler for vector > [ 342.266916] do_IRQ: 0.155 No irq handler for vector > [ 347.258422] do_IRQ: 14053260 callbacks suppressed > [...] These kind of issues are usually fixed by fixing the network driver's shutdown routine to ensure that MSI interrupts are cleared there. _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec