From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753132AbbEGGyj (ORCPT ); Thu, 7 May 2015 02:54:39 -0400 Received: from mail-wg0-f41.google.com ([74.125.82.41]:32800 "EHLO mail-wg0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751429AbbEGGyh (ORCPT ); Thu, 7 May 2015 02:54:37 -0400 Message-ID: <1430981678.2955.121.camel@gmail.com> Subject: Re: [KERNEL BUG] do_timer/tick_handover_do_timer 3.10.17 From: Mike Galbraith To: "Oza (Pawandeep) Oza" Cc: pawandeep oza , "linux-kernel@vger.kernel.org" , malayasen rout Date: Thu, 07 May 2015 08:54:38 +0200 In-Reply-To: <5C6899BCED92C94EBDCC00F80838E3D52113A8D3@SJEXCHMB06.corp.ad.broadcom.com> References: <1430968960.2955.45.camel@gmail.com> <5C6899BCED92C94EBDCC00F80838E3D52113A83F@SJEXCHMB06.corp.ad.broadcom.com> <1430975311.2955.73.camel@gmail.com> <5C6899BCED92C94EBDCC00F80838E3D52113A87B@SJEXCHMB06.corp.ad.broadcom.com> <1430978071.2955.96.camel@gmail.com> <5C6899BCED92C94EBDCC00F80838E3D52113A8D3@SJEXCHMB06.corp.ad.broadcom.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.12.11 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2015-05-07 at 05:58 +0000, Oza (Pawandeep) Oza wrote: > Yes. > But dying kernel doesn’t mean it CAN NOT INCREMENT jiffies. > do_timer should do the job until kernel takes its last breathe and more precisely CPU0 take its last breathe by halting itself as its last instruction. Feel free to add a redundant timer subsystem lest we BUG() in there, and whatever else you need to guarantee a perfect orderly death for your box. I prefer live boxen, would make that BUG() go away. -Mike