Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751922AbXLEAkh (ORCPT ); Tue, 4 Dec 2007 19:40:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750915AbXLEAk3 (ORCPT ); Tue, 4 Dec 2007 19:40:29 -0500 Received: from smtp2.linux-foundation.org ([207.189.120.14]:45682 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750813AbXLEAk2 (ORCPT ); Tue, 4 Dec 2007 19:40:28 -0500 Date: Tue, 4 Dec 2007 16:39:46 -0800 From: Andrew Morton To: Ingo Molnar Cc: lenb@kernel.org, ebiederm@xmission.com, protasnb@gmail.com, ak@suse.de, tglx@linutronix.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH] i386 IOAPIC: de-fang IRQ compression Message-Id: <20071204163946.63ac73ce.akpm@linux-foundation.org> In-Reply-To: <20071204122649.GB27286@elte.hu> References: <200711280121.18376.lenb@kernel.org> <20071204122649.GB27286@elte.hu> X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.20; i486-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1077 Lines: 26 On Tue, 4 Dec 2007 13:26:49 +0100 Ingo Molnar wrote: > * Len Brown 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 > > thanks for the patch and the extensive description. I've applied this to > x86.git. Len applied it to his tree too. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/