From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-1.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1Qvwd3-0005ov-Rr for user-mode-linux-devel@lists.sourceforge.net; Tue, 23 Aug 2011 19:27:17 +0000 Received: from terminus.zytor.com ([198.137.202.10] helo=mail.zytor.com) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1Qvwd3-0001VF-3G for user-mode-linux-devel@lists.sourceforge.net; Tue, 23 Aug 2011 19:27:17 +0000 Message-ID: <4E53FEE0.30107@zytor.com> Date: Tue, 23 Aug 2011 12:26:24 -0700 From: "H. Peter Anvin" MIME-Version: 1.0 References: <4E52D280.3010107@zytor.com> <20110823000314.GW2203@ZenIV.linux.org.uk> <4E52EF2A.8060608@zytor.com> <20110823010146.GY2203@ZenIV.linux.org.uk> <20110823011312.GZ2203@ZenIV.linux.org.uk> <20110823021717.GA2203@ZenIV.linux.org.uk> <20110823061531.GC2203@ZenIV.linux.org.uk> <20110823164849.GF2203@ZenIV.linux.org.uk> <4E53FCF7.7060703@zytor.com> In-Reply-To: List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net Subject: Re: [uml-devel] SYSCALL, ptrace and syscall restart breakages (Re: [RFC] weird crap with vdso on uml/i386) To: Linus Torvalds Cc: Andrew Lutomirski , "user-mode-linux-devel@lists.sourceforge.net" , Richard Weinberger , "linux-kernel@vger.kernel.org" , Borislav Petkov , "mingo@redhat.com" , Al Viro , Ingo Molnar On 08/23/2011 12:24 PM, Linus Torvalds wrote: > On Tue, Aug 23, 2011 at 12:18 PM, H. Peter Anvin wrote: >> >> We could drop that information in a metaregister. It's not backward >> compatible, but at least it will be obvious when that information is >> available and not. > > Well, seriously, UML already looks at the word at "ip-2" for other > reasons. So it isn't like there is any point in adding more support to > just give you that information in another form. > Not for UML, but it might be useful for other things. Certainly lowers the priority, though. -hpa ------------------------------------------------------------------------------ Get a FREE DOWNLOAD! and learn more about uberSVN rich system, user administration capabilities and model configuration. Take the hassle out of deploying and managing Subversion and the tools developers use with it. http://p.sf.net/sfu/wandisco-d2d-2 _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755946Ab1HWT12 (ORCPT ); Tue, 23 Aug 2011 15:27:28 -0400 Received: from terminus.zytor.com ([198.137.202.10]:57784 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755304Ab1HWT1Z (ORCPT ); Tue, 23 Aug 2011 15:27:25 -0400 Message-ID: <4E53FEE0.30107@zytor.com> Date: Tue, 23 Aug 2011 12:26:24 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:6.0) Gecko/20110816 Thunderbird/6.0 MIME-Version: 1.0 To: Linus Torvalds CC: Al Viro , Andrew Lutomirski , Borislav Petkov , Ingo Molnar , "user-mode-linux-devel@lists.sourceforge.net" , Richard Weinberger , "linux-kernel@vger.kernel.org" , "mingo@redhat.com" Subject: Re: [uml-devel] SYSCALL, ptrace and syscall restart breakages (Re: [RFC] weird crap with vdso on uml/i386) References: <4E52D280.3010107@zytor.com> <20110823000314.GW2203@ZenIV.linux.org.uk> <4E52EF2A.8060608@zytor.com> <20110823010146.GY2203@ZenIV.linux.org.uk> <20110823011312.GZ2203@ZenIV.linux.org.uk> <20110823021717.GA2203@ZenIV.linux.org.uk> <20110823061531.GC2203@ZenIV.linux.org.uk> <20110823164849.GF2203@ZenIV.linux.org.uk> <4E53FCF7.7060703@zytor.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/23/2011 12:24 PM, Linus Torvalds wrote: > On Tue, Aug 23, 2011 at 12:18 PM, H. Peter Anvin wrote: >> >> We could drop that information in a metaregister. It's not backward >> compatible, but at least it will be obvious when that information is >> available and not. > > Well, seriously, UML already looks at the word at "ip-2" for other > reasons. So it isn't like there is any point in adding more support to > just give you that information in another form. > Not for UML, but it might be useful for other things. Certainly lowers the priority, though. -hpa