linux-kernel - Re: [patch 0/9] x86, xsave: xsave/xrstor support

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Message-ID: <20080731221924.GD8563@linux-os.sc.intel.com>
Date:	Thu, 31 Jul 2008 15:19:24 -0700
From:	Suresh Siddha <suresh.b.siddha@...el.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"torvalds@...ux-foundation.org" <torvalds@...ux-foundation.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"arjan@...ux.intel.com" <arjan@...ux.intel.com>,
	"roland@...hat.com" <roland@...hat.com>,
	"drepper@...hat.com" <drepper@...hat.com>,
	"mikpe@...uu.se" <mikpe@...uu.se>,
	"chrisw@...s-sol.org" <chrisw@...s-sol.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [patch 0/9] x86, xsave: xsave/xrstor support

On Thu, Jul 31, 2008 at 03:14:35PM -0700, Andi Kleen wrote:
> > Kernel was enabling watchdog, with out the userspace having the
> > heartbeat daemon....
> 
> Watchdog are  normally only armed when someone opens the device
> first.

But thats not what I see with for ex with, w83627hf_wdt.c

Its done at the module_init time. (while I thought it should be
really done when some user level app opens the device, probably
its poorly written to take care if the kernel panics before starting userland.
but kernel can even die before the watchdog driver load aswell ;-)
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