linux-kernel - Re: [PATCH 4/6] Watchdog: introdouce "pretimeout" into framework

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Date:	Tue, 19 May 2015 01:22:41 +0800
From:	Fu Wei <fu.wei@...aro.org>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
	linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org,
	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>,
	Timur Tabi <timur@...eaurora.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Arnd Bergmann <arnd@...db.de>, vgandhi@...eaurora.org,
	wim@...ana.be, Jon Masters <jcm@...hat.com>,
	Leo Duran <leo.duran@....com>, Jon Corbet <corbet@....net>
Subject: Re: [PATCH 4/6] Watchdog: introdouce "pretimeout" into framework

Hi Guenter,

yes, I think it is OK for me,

Once this patchset is merged, I will try to make a new patchset just
for this integration.

On 16 May 2015 at 02:01, Guenter Roeck <linux@...ck-us.net> wrote:
> On Fri, May 15, 2015 at 09:49:07PM +0800, Fu Wei wrote:
>> Hi Guenter,
>>
>> Great thanks for your review,
>> feedback inline below :-)
>>
>> On 15 May 2015 at 21:33, Guenter Roeck <linux@...ck-us.net> wrote:
>
> [ ... ]
>
>> >> +       if (wdd->max_pretimeout && wdd->max_timeout < wdd->max_pretimeout)
>> >> {
>> >> +               pr_info("Invalid max timeout, resetting to max
>> >> pretimeout!\n");
>> >> +               wdd->max_timeout = wdd->max_pretimeout;
>> >> +       }
>> >
>> >
>> > I am a bit concerned about the context dependency introduced here. If
>> > someone calls
>> > _init_pretimeout after calling init_timeout, this may result in still
>> > invalid timeout
>> > values.
>>
>> yes, that logic is not very clean, so my thought is :
>> maybe we can integrate watchdog_init_timeout and watchdog_init_pretimeout,
>> if maintainer agree to add pretimeout into framework.
>>
> I think we should just assume that Wim will accept it, and try to find
> the best possible solution (or at least a good one).
>
> Guenter



-- 
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)
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