Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 24 Sep 2002 09:47:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 24 Sep 2002 09:47:23 -0400 Received: from pc-62-30-72-148-ed.blueyonder.co.uk ([62.30.72.148]:63362 "EHLO sisko.scot.redhat.com") by vger.kernel.org with ESMTP id ; Tue, 24 Sep 2002 09:47:22 -0400 Date: Tue, 24 Sep 2002 14:52:25 +0100 From: "Stephen C. Tweedie" To: John Gardiner Myers Cc: linux-aio , linux-kernel Subject: Re: [RFC] adding aio_readv/writev Message-ID: <20020924145225.J3160@redhat.com> References: <3D8B878C.8070503@watson.ibm.com> <1032555981.2082.10.camel@dell_ss3.pdx.osdl.net> <3D8F256D.1070107@watson.ibm.com> <20020923114104.A11680@redhat.com> <3D9066AD.6030904@netscape.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <3D9066AD.6030904@netscape.com>; from jgmyers@netscape.com on Tue, Sep 24, 2002 at 06:20:45AM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 859 Lines: 23 Hi, On Tue, Sep 24, 2002 at 06:20:45AM -0700, John Gardiner Myers wrote: > Benjamin LaHaise wrote: > > >Only db2 uses vectored io heavily. Oracle does not, and none of the open > >source databases do. Vectored io is pretty useless for most people. > > > > > writev is extremely important for networking as it avoids small packets. No, all you can infer from that is that "some method for avoiding small packets is important for networking." TCP_CORK already does that in Linux, for tcp at least, without requiring writev. (Of course, normal nonblocking writev is still there if you want it.) --Stephen - 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/