From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751354AbbINEVO (ORCPT ); Mon, 14 Sep 2015 00:21:14 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59241 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750862AbbINEVK (ORCPT ); Mon, 14 Sep 2015 00:21:10 -0400 Date: Mon, 14 Sep 2015 09:51:04 +0530 From: Pratyush Anand To: Jon Masters , Timur Tabi , Guenter Roeck , fu.wei@linaro.org Cc: Suravee.Suthikulpanit@amd.com, linaro-acpi@lists.linaro.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, tekkamanninja@gmail.com, graeme.gregory@linaro.org, al.stone@linaro.org, hanjun.guo@linaro.org, ashwin.chaugule@linaro.org, arnd@arndb.de, vgandhi@codeaurora.org, wim@iguana.be, leo.duran@amd.com, corbet@lwn.net, mark.rutland@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net Subject: Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver Message-ID: <20150914042104.GA4682@localhost.localdomain> References: <=fu.wei@linaro.org> <1433217907-928-1-git-send-email-fu.wei@linaro.org> <1433217907-928-6-git-send-email-fu.wei@linaro.org> <556F4489.6030206@codeaurora.org> <20150603182503.GD6460@roeck-us.net> <556F4D29.1080001@codeaurora.org> <55F207FD.2030007@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55F207FD.2030007@redhat.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/09/2015:06:45:17 PM, Jon Masters wrote: > On 06/03/2015 02:53 PM, Timur Tabi wrote: > > On 06/03/2015 01:25 PM, Guenter Roeck wrote: > >> In general the idea here would be to use a crashdump kernel, which, > >> when loaded, would reset the watchdog before it fires. This kernel > >> would then write a core dump to a specified location. And this is what we do in fedora or RHEL. There had been some work ongoing in fedora [1][2] which will help to reset any active watchdog in kdump kernel(if the watchdog driver has been registered to watchdog_class). It will eventually help a watchdog on ARM64 platform as well. [1] https://lists.fedoraproject.org/pipermail/kexec/2015-September/002295.html [2] https://github.com/pratyushanand/kexec-tools/commits/watchdog_fmaster ~Pratyush