From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751750AbbI1Tc3 (ORCPT ); Mon, 28 Sep 2015 15:32:29 -0400 Received: from www.sr71.net ([198.145.64.142]:36521 "EHLO blackbird.sr71.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751105AbbI1Tc2 (ORCPT ); Mon, 28 Sep 2015 15:32:28 -0400 Subject: Re: [PATCH 10/26] x86, pkeys: notify userspace about protection key faults To: Christian Borntraeger , Ingo Molnar References: <20150916174903.E112E464@viggo.jf.intel.com> <20150916174906.51062FBC@viggo.jf.intel.com> <20150924092320.GA26876@gmail.com> <56042F96.6030107@sr71.net> <56099444.1010902@de.ibm.com> Cc: x86@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Andrew Morton , Peter Zijlstra , Thomas Gleixner From: Dave Hansen Message-ID: <560995CA.2000403@sr71.net> Date: Mon, 28 Sep 2015 12:32:26 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <56099444.1010902@de.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 09/28/2015 12:25 PM, Christian Borntraeger wrote: > We do not have the storage keys per page table, but for the page frame instead > (shared among all mappers) so I am not sure if the whole thing will fit for s390. > Having a signal for page protection errors might be useful for us - not sure yet. Ugh, yeah, that's a pretty different architecture. The stuff we have here (syscall, VMA flags, etc...) is probably useful to you only for controlling access to non-shared memory.