Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755851Ab3I3RtE (ORCPT ); Mon, 30 Sep 2013 13:49:04 -0400 Received: from mailgw1.uni-kl.de ([131.246.120.220]:58379 "EHLO mailgw1.uni-kl.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755110Ab3I3RtC (ORCPT ); Mon, 30 Sep 2013 13:49:02 -0400 Message-ID: <5249B987.8020807@itwm.fraunhofer.de> Date: Mon, 30 Sep 2013 19:48:55 +0200 From: Bernd Schubert User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0 MIME-Version: 1.0 To: "Myklebust, Trond" CC: Miklos Szeredi , Ric Wheeler , "J. Bruce Fields" , Zach Brown , Anna Schumaker , Kernel Mailing List , Linux-Fsdevel , "linux-nfs@vger.kernel.org" , "Schumaker, Bryan" , "Martin K. Petersen" , Jens Axboe , Mark Fasheh , Joel Becker , Eric Wong Subject: Re: [RFC] extending splice for copy offloading References: <20130930143432.GG16579@fieldses.org> <52499026.3090802@redhat.com> <52498AA8.2090204@redhat.com> <52498DB6.7060901@redhat.com> <52498F68.8050200@redhat.com> <20130930163159.GA14242@tucsk.piliscsaba.szeredi.hu> <5249B21E.70603@itwm.fraunhofer.de> <1380563050.6501.15.camel@leira.trondhjem.org> In-Reply-To: <1380563050.6501.15.camel@leira.trondhjem.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ITWM-CharSet: UTF-8 X-ITWM-Scanned-By: mail2.itwm.fhg.de Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1152 Lines: 25 On 09/30/2013 07:44 PM, Myklebust, Trond wrote: > On Mon, 2013-09-30 at 19:17 +0200, Bernd Schubert wrote: >> It would be nice if there would be way if the file system would get a >> hint that the target file is supposed to be copy of another file. That >> way distributed file systems could also create the target-file with the >> correct meta-information (same storage targets as in-file has). >> Well, if we cannot agree on that, file system with a custom protocol at >> least can detect from 0 to SSIZE_MAX and then reset metadata. I'm not >> sure if this would work for pNFS, though. > > splice() does not create new files. What you appear to be asking for > lies way outside the scope of that system call interface. > Sorry I know, definitely outside the scope of splice, but in the context of offloaded file copies. So the question is, what is the best way to address/discuss that? Thanks, Bernd -- 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/