linux-kernel - Re: eurotechwdt will cause reboot

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Date:	Mon, 6 Aug 2007 09:32:30 +0000
From:	"Dave Young" <hidave.darkstar@...il.com>
To:	"Wim Van Sebroeck" <wim@...ana.be>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>
Subject: Re: eurotechwdt will cause reboot

>On 8/3/07, Wim Van Sebroeck <wim@...ana.be> wrote:
> Hi Dave,
>
> > Hi,
> > News: 2.6.23-rc1-mm1 will reboot with eurotechwdt, but 2.6.23-rc1-mm2
> > will not. do you need the config files?
> >
> > I will concentrate on this problem as well. Any hints how to debug?
>
> Yes: make a diff file between the two versions and see what has changed.
> If something changed on the eurotechwdt file then that is probably the
> answer you are looking for.  Else it will mean that your problem is fixed
> by other code and then we will have to find out which code did this.
>
> I was reading the datasheet to see how the driver worked. But I think
> we want to concentrate now first on what the difference is between the
> -mm1 and -mm2. Luckily something fixed allready your problem. Now it would
> be usefull to know what that was.

Yes, I think I get the reason.

The -mm1 kernel/irq/manage.c send a fake irq via handler in
request_irq function. -mm2 surround it with  #ifdef CONFIG_DEBUG_SHIRQ
/ #endif.

Regards
dave
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