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Date: Thu, 6 Dec 2007 21:41:04 -0500 From: Len Brown <lenb@...nel.org> To: Ingo Molnar <mingo@...e.hu>, ebiederm@...ssion.com Cc: Andrew Morton <akpm@...ux-foundation.org>, protasnb@...il.com, ak@...e.de, tglx@...utronix.de, linux-kernel@...r.kernel.org Subject: Re: [PATCH] i386 IOAPIC: de-fang IRQ compression On Wednesday 05 December 2007 04:48, Ingo Molnar wrote: > > * 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. Sure. I'm re-basing my test branch right now and can exclude this one since it is in x86.git. (and yes, I'm interested in unifying mpparse_*.c some day) yes, your understanding is correct -- this is not urgent 2.6.24 material, it is just a 'regular patch':-) Re: making the VIA part into dead-code I had avoided that originally because I was going to nominate this patch for the highest check-in-comment length/code-change ratio But once I went over 1 line I blew the budget;-) Eric, What do you suggest we do with NR_IRQS on i386 so that we can delete the compression code entirely? thanks, -Len -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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