linux-kernel - Re: Regression: Bisected, IRQ and MSI allocations screwed without sparse irq

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Message-Id: <20081121.150652.143573683.davem@davemloft.net>
Date:	Fri, 21 Nov 2008 15:06:52 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	hawk@...u.dk
Cc:	tglx@...utronix.de, jdb@...x.dk, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Robert.Olsson@...a.slu.se,
	mingo@...e.hu
Subject: Re: Regression: Bisected, IRQ and MSI allocations screwed without
 sparse irq

From: Jesper Dangaard Brouer <hawk@...u.dk>
Date: Fri, 21 Nov 2008 20:35:32 +0100 (CET)

> On Fri, 21 Nov 2008, Thomas Gleixner wrote:
> 
> > On Fri, 21 Nov 2008, Jesper Dangaard Brouer wrote:
> >>> Can you please try the attached patch ?
> >>
> >> I have tried the patch and it solved the problem! :-)
> >>
> >> I'll gladly test other patches from your.  Guess this patch needs to be
> >> brushed up before a mainline patch is ready.
> >
> > Ok, I queue it for mainline. This solves just the number of irqs
> > limitation, the rmmod problem still persists, right ?
> 
> It solves both the irq limit and the NIU driver unload bug.

I think it "solves" the unload BUG because the driver never has
to fallback to IO_APIC irqs and abort trying to use MSI-X
any longer.

Only the IRQ limit bug is fixed by Thomas's patch.
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