linux-kernel - Re: [Bug 7505] Linux-2.6.18 fails to boot on AMD64 machine

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Date:	Wed, 20 Dec 2006 11:55:58 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	Andrew Morton <akpm@...l.org>
Cc:	Chuck Ebbert <76306.1226@...puserve.com>,
	Yinghai Lu <yinghai.lu@....com>,
	"ard@...egraafnet.nl" <ard@...egraafnet.nl>, take@...ero.it,
	agalanin@...a.ru, linux-kernel@...r.kernel.org,
	bugme-daemon@...zilla.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Zhang Yanmin <yanmin.zhang@...el.com>
Subject: Re: [Bug 7505] Linux-2.6.18 fails to boot on AMD64 machine

On Wed, 2006-12-20 at 02:37 -0800, Andrew Morton wrote:
> On Wed, 20 Dec 2006 04:59:19 -0500
> Chuck Ebbert <76306.1226@...puserve.com> wrote:
> 
> > > On 12/19/06, Chuck Ebbert <76306.1226@...puserve.com> wrote:
> > > > So an external interrupt occurred, the system tried to use interrupt
> > > > descriptor #39 decimal (irq 7), but the descriptor was invalid.
> > > 
> > > but the irq is disabled at that time.
> > > 
> > > can you use attached diff to verify if the irq is enable somehow?
> > 
> > But it seems interrupts are on--look at the flags:
> > 
> >         RSP: 0018:ffffffff803cdf68  EFLAGS: 00010246
> > 
> 
> down_write()->__down_write() -> __down_write_nested()->spin_unlock_irq()->dead

since down_write() sleeps..... what?


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