From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753953AbYIVVWz (ORCPT ); Mon, 22 Sep 2008 17:22:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752981AbYIVVWs (ORCPT ); Mon, 22 Sep 2008 17:22:48 -0400 Received: from zrtps0kp.nortel.com ([47.140.192.56]:36393 "EHLO zrtps0kp.nortel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752440AbYIVVWs (ORCPT ); Mon, 22 Sep 2008 17:22:48 -0400 Message-ID: <48D80C9C.2070108@nortel.com> Date: Mon, 22 Sep 2008 15:22:36 -0600 From: "Chris Friesen" User-Agent: Thunderbird 2.0.0.16 (X11/20080707) MIME-Version: 1.0 To: David Miller CC: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jens.axboe@oracle.com, steffen.klassert@secunet.com Subject: Re: [PATCH 0/2]: Remote softirq invocation infrastructure. References: <20080919.234824.223177211.davem@davemloft.net> In-Reply-To: <20080919.234824.223177211.davem@davemloft.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 22 Sep 2008 21:22:38.0047 (UTC) FILETIME=[56808EF0:01C91CF9] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org David Miller wrote: > Jens Axboe has written some hacks for the block layer that allow > queueing softirq work to remote cpus. In the context of the block > layer he used this facility to trigger the softirq block I/O > completion on the same cpu where the I/O was submitted. > I intend to use this > for receive side flow seperation on non-multiqueue network cards. I'm not sure this belongs in this particular thread but I was interested in how you're planning on doing this? Is there going to be a way for userspace to specify which traffic flows they'd like to direct to particular cpus, or will the kernel try to figure it out on the fly? We have application guys that would like very much to be able to nail specific apps to specific cores and have the kernel send all their packets to those cores for processing. Chris