Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754878AbZGCApw (ORCPT ); Thu, 2 Jul 2009 20:45:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752380AbZGCApp (ORCPT ); Thu, 2 Jul 2009 20:45:45 -0400 Received: from mail-vw0-f202.google.com ([209.85.212.202]:54860 "EHLO mail-vw0-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751917AbZGCApo convert rfc822-to-8bit (ORCPT ); Thu, 2 Jul 2009 20:45:44 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=ER4yZxbBIHcdPOwfHydWKPy35usA9szTrOpIby3H10GAm1z2R5QGTyuZyA61E1HI5f iHyrN4zDqqlJQM4i+IisIHZ8oVX2kqr9C61LW6g9Bgp+xVx2kJ9r9fwdEHxZEABslyiP SSgjfCOZXp4727TAYbrLKRx7ER8exlAmGvbNA= MIME-Version: 1.0 In-Reply-To: <20090702114207.58724071@lxorguk.ukuu.org.uk> References: <412e6f7f0907020036y76abbc7du99c7b695f725be4@mail.gmail.com> <20090702091309.GB6372@cr0.nay.redhat.com> <412e6f7f0907020218m1f4a9651l2c682a9905925bcd@mail.gmail.com> <20090702114207.58724071@lxorguk.ukuu.org.uk> Date: Fri, 3 Jul 2009 08:45:47 +0800 Message-ID: <412e6f7f0907021745k41e5c7aeua35200d5047c1aa@mail.gmail.com> Subject: Re: PROPOSAL: extend pipe() to support NULL argument. From: Changli Gao To: Alan Cox Cc: Amerigo Wang , Linus Torvalds , Linux Kernel Mailing List Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 900 Lines: 27 On Thu, Jul 2, 2009 at 6:42 PM, Alan Cox wrote: > On Thu, 2 Jul 2009 17:18:49 +0800 > Changli Gao wrote: > >> On Thu, Jul 2, 2009 at 5:13 PM, Amerigo Wang wrote: >> > On Thu, Jul 02, 2009 at 03:36:41PM +0800, Changli Gao wrote: >> > >> > Why? Why do you need this feature? >> > >> Are you familiar with splice() and tee()? They both use pipes as kernel buffers. > > And are being used quite happily with the pipe() call. So what is the > problem ? > No problem! But I just want to save a fd. As one RW pipe fd is enough for splicing. -- Regards， Changli Gao(xiaosuo@gmail.com) -- 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/