From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1E4c18-0005Em-Dh for user-mode-linux-devel@lists.sourceforge.net; Mon, 15 Aug 2005 03:16:30 -0700 Received: from caramon.arm.linux.org.uk ([212.18.232.186]) by mail.sourceforge.net with esmtps (TLSv1:DES-CBC3-SHA:168) (Exim 4.44) id 1E4c0d-0005hg-TC for user-mode-linux-devel@lists.sourceforge.net; Mon, 15 Aug 2005 03:16:30 -0700 From: Russell King Message-ID: <20050815111548.F19811@flint.arm.linux.org.uk> References: <20050812182145.DF52E24E7F3@zion.home.lan> <20050815104022.D19811@flint.arm.linux.org.uk> <43006AA6.1040405@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <43006AA6.1040405@yahoo.com.au>; from nickpiggin@yahoo.com.au on Mon, Aug 15, 2005 at 08:12:54PM +1000 Subject: [uml-devel] Re: [patch 18/39] remap_file_pages protection support: add VM_FAULT_SIGSEGV Sender: user-mode-linux-devel-admin@lists.sourceforge.net Errors-To: user-mode-linux-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: The user-mode Linux development list List-Post: List-Help: List-Subscribe: , List-Archive: Date: Mon, 15 Aug 2005 11:15:48 +0100 To: Nick Piggin Cc: blaisorblade@yahoo.it, akpm@osdl.org, jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, mingo@elte.hu On Mon, Aug 15, 2005 at 08:12:54PM +1000, Nick Piggin wrote: > Well there is now, and that is we are now using a bit in the 2nd > byte as flags. So I had to do away with -ve numbers there entirely. > > You could achieve a similar thing by using another bit in that byte > #define VM_FAULT_FAILED 0x20 > and make that bit present in VM_FAULT_OOM and VM_FAULT_SIGBUS, then > do an unlikely test for that bit in your handler and branch away to > the slow path. That'll do as well, thanks. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core ------------------------------------------------------- SF.Net email is Sponsored by the Better Software Conference & EXPO September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf _______________________________________________ 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 S932611AbVHOKPz (ORCPT ); Mon, 15 Aug 2005 06:15:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932629AbVHOKPy (ORCPT ); Mon, 15 Aug 2005 06:15:54 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:21005 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S932611AbVHOKPy (ORCPT ); Mon, 15 Aug 2005 06:15:54 -0400 Date: Mon, 15 Aug 2005 11:15:48 +0100 From: Russell King To: Nick Piggin Cc: blaisorblade@yahoo.it, akpm@osdl.org, jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, mingo@elte.hu Subject: Re: [patch 18/39] remap_file_pages protection support: add VM_FAULT_SIGSEGV Message-ID: <20050815111548.F19811@flint.arm.linux.org.uk> Mail-Followup-To: Nick Piggin , blaisorblade@yahoo.it, akpm@osdl.org, jdike@addtoit.com, linux-kernel@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, mingo@elte.hu References: <20050812182145.DF52E24E7F3@zion.home.lan> <20050815104022.D19811@flint.arm.linux.org.uk> <43006AA6.1040405@yahoo.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <43006AA6.1040405@yahoo.com.au>; from nickpiggin@yahoo.com.au on Mon, Aug 15, 2005 at 08:12:54PM +1000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Aug 15, 2005 at 08:12:54PM +1000, Nick Piggin wrote: > Well there is now, and that is we are now using a bit in the 2nd > byte as flags. So I had to do away with -ve numbers there entirely. > > You could achieve a similar thing by using another bit in that byte > #define VM_FAULT_FAILED 0x20 > and make that bit present in VM_FAULT_OOM and VM_FAULT_SIGBUS, then > do an unlikely test for that bit in your handler and branch away to > the slow path. That'll do as well, thanks. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core