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Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm3-V0.7.32-12
From: Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>, Rui Nuno Capela <rncbc@rncbc.org>,
       LKML <linux-kernel@vger.kernel.org>, Lee Revell <rlrevell@joe-job.com>,
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On Fri, 2004-12-10 at 18:26, Steven Rostedt wrote:
> On Fri, 2004-12-10 at 12:11 +0100, Ingo Molnar wrote:
> > * Steven Rostedt <rostedt@goodmis.org> wrote:
> > 
> > > Second, my ethernet doesn't work, and it really seems to be some kind
> > > of interrupt trouble.  It sends out ARPs but doesn't see them come
> > > back, and it also doesn't seem to know that it sent them out. I get
> > > the following:
> > > 
> 
> <snip>
> 
> > > I'll hack on it some more.
> > 
> > yeah, please check this - you are the first one to report this issue.
> 
> Hi Ingo,  I found the problem! and I now know why John Cooper didn't
> have this problem too.  I have CONFIG_PCI_MSI defined. I don't know why,
> I must have seen the option a while ago and said to myself "That looks
> cool, lets try it". Since I started with the config file of the vanilla
> kernel with your rt patches, it was still on. 
> 
> Anyways, what is happening is that the io_apic code is mapping irqs to
> vectors, and your code didn't account for it. So here's my patch.

Can't wait to try the patch, I don't have CONFI_PCI_MSI defined in the
configurations I use. I've had problems with a network card (R8169
driver) for a while (I think I reported it), the interrupts were being
ignored. Hopefully the same problem...

-- Fernando