linux-kernel - Re: [PATCH] i386 IOAPIC: de-fang IRQ compression

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Message-ID: <20071205094837.GB17911@elte.hu>
Date:	Wed, 5 Dec 2007 10:48:38 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	lenb@...nel.org, ebiederm@...ssion.com, protasnb@...il.com,
	ak@...e.de, tglx@...utronix.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] i386 IOAPIC: de-fang IRQ compression


* Andrew Morton <akpm@...ux-foundation.org> wrote:

> On Tue, 4 Dec 2007 13:26:49 +0100
> Ingo Molnar <mingo@...e.hu> wrote:
> 
> > * Len Brown <lenb@...nel.org> wrote:
> > 
> > >     So while the irq compression code on i386 should really
> > >     be deleted -- even before merging the x86_64 irq-overhaul,
> > >     this patch simply disables it on all high volume systems
> > >     to avoid problems #1 and #2 on most all i386 systems.
> > >     
> > >     A large system with pin numbers >=64 will still have compression
> > >     to conserve limited IRQ numbers for sparse IOAPICS.  However,
> > >     the vast majority of the planet, those with only pin numbers < 64
> > >     will use an identity GSI -> IRQ mapping.
> > >     
> > >     Signed-off-by: Len Brown <len.brown@...el.com>
> > 
> > thanks for the patch and the extensive description. I've applied this to 
> > x86.git.
> 
> Len applied it to his tree too.

Len, i think this belongs into x86.git a bit more (especially with the 
unification activities going on all around the tree) - do you agree? 
Andrew, i'd suggest to apply a reverted patch to between git.acpi and 
git.x86 until this gets sorted out.

	Ingo
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