Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754229AbZIWHEo (ORCPT ); Wed, 23 Sep 2009 03:04:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754037AbZIWHEo (ORCPT ); Wed, 23 Sep 2009 03:04:44 -0400 Received: from mail-gw.exalead.com ([193.47.80.29]:35265 "EHLO exalead.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751602AbZIWHEn (ORCPT ); Wed, 23 Sep 2009 03:04:43 -0400 Message-ID: <4AB9C879.1090709@exalead.com> Date: Wed, 23 Sep 2009 09:04:25 +0200 From: Xavier Roche Organization: Exalead User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.8.1.22) Gecko/20090606 SeaMonkey/1.1.17 MIME-Version: 1.0 To: Arjan van de Ven CC: Linux Kernel Subject: Re: Inter-process send()/recv() using zero-copy ? References: <4AB9B9B7.1020309@exalead.com> <20090923084314.78283f24@infradead.org> In-Reply-To: <20090923084314.78283f24@infradead.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 524 Lines: 12 Arjan van de Ven wrote: > 1) memory copies are cheap > (say, 3000 cycles/page or less) Yes, but this case would be more than useful for large memory blocks (typically memory_size/N, with N typically 2..10) -- something you generally have when you deal with mmap'ed blocks. -- 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/