linux-kernel - Re: [PATCH] msm: watchdog: support watchdog on 8x60 and 8960

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Date:	Wed, 30 Mar 2011 09:03:26 -0700
From:	Daniel Walker <dwalker@...o99.com>
To:	Jeff Ohlstein <johlstei@...eaurora.org>
Cc:	Bryan Huntsman <bryanh@...eaurora.org>,
	David Brown <davidb@...eaurora.org>,
	linux-arm-msm@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>,
	Stepan Moskovchenko <stepanm@...eaurora.org>,
	Gregory Bean <gbean@...eaurora.org>,
	Abhijeet Dharmapurikar <adharmap@...eaurora.org>
Subject: Re: [PATCH] msm: watchdog: support watchdog on 8x60 and 8960

On Tue, 2011-03-29 at 21:40 -0700, Jeff Ohlstein wrote:
> Daniel Walker wrote:
> > Are you saying this is mostly a debugging facility ? The interrupts off
> > thing I can see as just debugging, but I don't understand the bus
> > lockups part.
> >   
> 
> It isn't just a debugging facility. It is still beneficial to the end user
> in that it restarts the system if there is a bus lockup or a faulty 
> interrupt
> handler in a rarely used codepath. This is better than the alternative 
> of draining
> the battery and turning off. We want this to be turned on independent of 
> what userspace
> one is using, unless they explicitly turn it off themselves.

It doesn't sound too different that all the other watchdogs in
drivers/watchdog/ .. Your just detecting lockups right?

Daniel

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