From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753947AbcEWJdi (ORCPT ); Mon, 23 May 2016 05:33:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38831 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752106AbcEWJdg (ORCPT ); Mon, 23 May 2016 05:33:36 -0400 Organization: Red Hat UK Ltd. Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20160523082230.GA21308@infradead.org> References: <20160523082230.GA21308@infradead.org> <20160510070421.GB30896@infradead.org> <6897.1462868755@warthog.procyon.org.uk> <20160512091141.GA22420@infradead.org> <3204439.9qcmCY96fi@wuerfel> To: Christoph Hellwig Cc: dhowells@redhat.com, Arnd Bergmann , linux-fsdevel@vger.kernel.org, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org Subject: Re: [PATCH 1/6] statx: Add a system call to make enhanced file info available MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <25304.1463996013.1@warthog.procyon.org.uk> Date: Mon, 23 May 2016 10:33:33 +0100 Message-ID: <25305.1463996013@warthog.procyon.org.uk> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Mon, 23 May 2016 09:33:36 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Christoph Hellwig wrote: > Honestly I think this really matters on the amount of 'emulation' we > need - if it's just adding a new flag that can be trivially generated > in the syscall stub in userland that's probably fine, but if we have > actually differing semantics (like the stat weak attributes) I'd rather > have a properly documented syscall. If we otherwise need to rewrite > whole structures I'd much rather do that in kernel space. I very much agree. > And to get back to stat: if would be really useful to coordinate the > new one with glibc so that we don't end up with two different stat > structures again like we do for a lot of platforms at the moment. I've tried reaching out to them and others, but no one responded. David