From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262401AbVFIOEF (ORCPT ); Thu, 9 Jun 2005 10:04:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262403AbVFIOEF (ORCPT ); Thu, 9 Jun 2005 10:04:05 -0400 Received: from ns2.suse.de ([195.135.220.15]:21385 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S262401AbVFIOEC (ORCPT ); Thu, 9 Jun 2005 10:04:02 -0400 Date: Thu, 9 Jun 2005 16:03:51 +0200 From: Andi Kleen To: Roland Dreier Cc: Andi Kleen , Grant Grundler , Greg KH , Jeff Garzik , "David S. Miller" , tom.l.nguyen@intel.com, linux-pci@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH] PCI: remove access to pci_[enable|disable]_msi() for drivers - take 2 Message-ID: <20050609140351.GD23831@wotan.suse.de> References: <20050607002045.GA12849@suse.de> <20050607202129.GB18039@kroah.com> <20050608050212.GD21060@colo.lackof.org> <20050608133226.GR23831@wotan.suse.de> <52oeagethh.fsf@topspin.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <52oeagethh.fsf@topspin.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 08, 2005 at 08:52:26AM -0700, Roland Dreier wrote: > Andi> x86-64 will eventually too, I definitely plan for it at some > Andi> point. We need it for very big machines where 255 interrupt > Andi> vectors are not enough. And as you say with MSI-X it becomes > Andi> even more important. > > MSI-X already works fine on x86-64. For example, on the machine I'm Yes, but only as long as you dont have too many devices. The problem is that there are only 255 interrupt vectors right now, and that is not enough for bigger systems with many devices. > sending this from, an Athlon64 system with Nforce 4 (and yes I am > using IP-over-InfiniBand as the only network connection on my workstation): A single CPU box does not even appear on the radar here. -Andi