linux-kernel - Re: [5/6] 2.6.21-rc2: known regressions

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Date:	Mon, 05 Mar 2007 08:42:16 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Adrian Bunk <bunk@...sta.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Emil Karlson <jkarlson@...hut.fi>,
	"Michael S. Tsirkin" <mst@...lanox.co.il>,
	Soeren Sonnenburg <kernel@....de>
Subject: Re: [5/6] 2.6.21-rc2: known regressions

On Mon, 2007-03-05 at 16:27 +0100, Ingo Molnar wrote:
> * Daniel Walker <dwalker@...sta.com> wrote:
> 
> > > > FYI, this is not a "wont boot" problem, this should be a "NMI 
> > > > watchdog does not work" problem - which has far lower severity. 
> > > > Also, Thomas did a fix for this which is now in -mm.
> > > 
> > > yup, you should be able to cross this one off, Adrian.  The fix 
> > > worked for me, at least.
> > 
> > I didn't see a fix for this one go by .. I'll check the usual places I 
> > guess ..
> 
> find it below.

This fix gets the NMI to tick like the timer (in /proc/interrupts) ..
However, now that it's ticking I don't think it's actually working
properly ..

I used this simple test case given by you a long time ago,

main ()
{
iopl(3);
for (;;) 
        asm("cli");

}

This doesn't look like a regression tho, 2.6.19-rc6 has the same
behavior ..

Daniel

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