From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752703AbZBDAqZ (ORCPT ); Tue, 3 Feb 2009 19:46:25 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750997AbZBDAqN (ORCPT ); Tue, 3 Feb 2009 19:46:13 -0500 Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:32796 "EHLO sunset.davemloft.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1750866AbZBDAqN (ORCPT ); Tue, 3 Feb 2009 19:46:13 -0500 Date: Tue, 03 Feb 2009 16:46:09 -0800 (PST) Message-Id: <20090203.164609.160183741.davem@davemloft.net> To: zbr@ioremap.net Cc: jarkao2@gmail.com, herbert@gondor.apana.org.au, w@1wt.eu, dada1@cosmosbay.com, ben@zeus.com, mingo@elte.hu, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jens.axboe@oracle.com Subject: Re: [PATCH v2] tcp: splice as many packets as possible at once From: David Miller In-Reply-To: <20090203111012.GA16878@ioremap.net> References: <20090202.235017.253437221.davem@davemloft.net> <20090203094108.GA4639@ff.dom.local> <20090203111012.GA16878@ioremap.net> X-Mailer: Mew version 6.1 on Emacs 22.1 / 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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Evgeniy Polyakov Date: Tue, 3 Feb 2009 14:10:12 +0300 > NTA tried to solve this by not allowing to free the data allocated on > the different CPU, contrary to what SLAB does. Modulo cache coherency > improvements, This could kill performance on NUMA systems if we are not careful. If we ever consider NTA seriously, these issues would need to be performance tested.