From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Borgerding Subject: Re: idea: user to user pipe copy Date: Fri, 23 Apr 2004 15:26:33 -0400 Sender: linux-fsdevel-owner@vger.kernel.org Message-ID: <40896DE9.80303@borgerding.net> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Jamie Lokier , linux-fsdevel@vger.kernel.org Return-path: Received: from ms-smtp-03-smtplb.ohiordc.rr.com ([65.24.5.137]:37112 "EHLO ms-smtp-03-eri0.ohiordc.rr.com") by vger.kernel.org with ESMTP id S263801AbUDWT0i (ORCPT ); Fri, 23 Apr 2004 15:26:38 -0400 Received: from borgerding.net (cvg-65-27-241-239.cinci.rr.com [65.27.241.239]) by ms-smtp-03-eri0.ohiordc.rr.com (8.12.10/8.12.7) with SMTP id i3NJQY2w015833 for ; Fri, 23 Apr 2004 15:26:35 -0400 (EDT) To: Bryan Henderson In-Reply-To: List-Id: linux-fsdevel.vger.kernel.org Jamie & Bryan, Thanks for your input on the user-to-user copy problem. I won't pretend to understand all the issues of which you speak. Are these issues insurmountable? Is it worth it? Would the extra complexity of the user-user copy add security holes and stability problems? If someone were willing to work on copy_user_to_other_user, I could manage the pipe work. Anyone feel like battling that windmill? Eliminating one out of two buffer copies is a fine and noble goal. Something you can brag to your grandkids about ;) BTW, it seems this could make unix sockets faster too. -- Mark