From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andi Kleen Subject: Re: [Ksummit-2005-discuss] Summary of 2005 Kernel Summit Proposed Topics Date: 30 Mar 2005 18:02:55 +0200 Message-ID: <20050330160255.GG12672@muc.de> References: <1112027284.5531.27.camel@mulgrave> <20050329152008.GD63268@muc.de> <1112116762.5088.65.camel@beastie> <1112130512.1077.107.camel@jzny.localdomain> <20050330152208.GB12672@muc.de> <20050330153313.GD32111@g5.random> <20050330153948.GE12672@muc.de> <20050330154418.GE32111@g5.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: jamal , Dmitry Yusupov , James Bottomley , Rik van Riel , mpm@selenic.com, michaelc@cs.wisc.edu, open-iscsi@googlegroups.com, ksummit-2005-discuss@thunk.org, netdev Return-path: Date: Wed, 30 Mar 2005 18:02:55 +0200 To: Andrea Arcangeli Content-Disposition: inline In-Reply-To: <20050330154418.GE32111@g5.random> Sender: netdev-bounce@oss.sgi.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Wed, Mar 30, 2005 at 05:44:18PM +0200, Andrea Arcangeli wrote: > On Wed, Mar 30, 2005 at 05:39:48PM +0200, Andi Kleen wrote: > > An unsolveable one IMHO. You can just try to be good enough. For that > > I think it's solvable with an algorithm I outlined several emails ago. The problem with you algorithm is that you cannot control how to NIC puts incoming packets into RX rings (and then actually if the packets you are interested in do actually arrive from the net ,-) While some NICs have hardware support to get high priority packets into different queues these tend to add nasty limits on the max number of connections. Which IMHO is not acceptable. "We have an enterprise class OS with iSCSI which can only support four swap devices" -Andi