linux-kernel - Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver

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Date:	Mon, 14 Sep 2015 23:27:55 +0800
From:	Fu Wei <fu.wei@...aro.org>
To:	Pratyush Anand <panand@...hat.com>
Cc:	Jon Masters <jcm@...hat.com>, Timur Tabi <timur@...eaurora.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>, linux-doc@...r.kernel.org,
	Wei Fu <tekkamanninja@...il.com>,
	G Gregory <graeme.gregory@...aro.org>,
	Al Stone <al.stone@...aro.org>,
	Hanjun Guo <hanjun.guo@...aro.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Arnd Bergmann <arnd@...db.de>,
	Vipul Gandhi <vgandhi@...eaurora.org>,
	Wim Van Sebroeck <wim@...ana.be>,
	Leo Duran <leo.duran@....com>, Jon Corbet <corbet@....net>,
	Mark Rutland <mark.rutland@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Rafael Wysocki <rjw@...ysocki.net>
Subject: Re: [PATCH v4 5/7] Watchdog: introduce ARM SBSA watchdog driver

Hi Pratyush,

Great thanks for your help on some update for watchdog framework.

For " Fix parent of watchdog_devices", I will update my patchset.
For the upstreaming patchset"Sysfs status read support", will make a
patch. But upstream it when your patchset is merged.

On 14 September 2015 at 12:21, Pratyush Anand <panand@...hat.com> wrote:
> 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



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat Software (Beijing) Co.,Ltd.Shanghai Branch
Ph: +86 21 61221326(direct)
Ph: +86 186 2020 4684 (mobile)
Room 1512, Regus One Corporate Avenue,Level 15,
One Corporate Avenue,222 Hubin Road,Huangpu District,
Shanghai,China 200021
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