Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262496AbTELSNX (ORCPT ); Mon, 12 May 2003 14:13:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262526AbTELSNW (ORCPT ); Mon, 12 May 2003 14:13:22 -0400 Received: from pizda.ninka.net ([216.101.162.242]:27277 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id S262496AbTELSNT (ORCPT ); Mon, 12 May 2003 14:13:19 -0400 Date: Mon, 12 May 2003 10:20:23 -0700 (PDT) Message-Id: <20030512.102023.71099561.davem@redhat.com> To: willy@debian.org Cc: jgarzik@pobox.com, linux-kernel@vger.kernel.org, ink@jurassic.park.msu.ru Subject: Re: Message Signalled Interrupt support? From: "David S. Miller" In-Reply-To: <20030512165331.GZ29534@parcelfarce.linux.theplanet.co.uk> References: <20030512163249.GF27111@gtf.org> <20030512165331.GZ29534@parcelfarce.linux.theplanet.co.uk> X-FalunGong: Information control. X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 941 Lines: 20 From: Matthew Wilcox Date: Mon, 12 May 2003 17:53:31 +0100 On Mon, May 12, 2003 at 12:32:49PM -0400, Jeff Garzik wrote: > Has anybody done any work, or put any thought, into MSI support? Work -- no. Thought? A little. Seems to me that MSIs need to be treated as a third form of interrupts (level/edge/message). The fact that Alpha already supports them pretty much transparently suggests that the thing to do might very well be "nothing" :-) To be honest, MSIs are very similar to how interrupts work on sparc64, in that each device generates a unique interrupt cookie. The only different is the size of this cookie, MSIs are larger than sparc64's. - 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/