From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932865AbdKGWrQ (ORCPT ); Tue, 7 Nov 2017 17:47:16 -0500 Received: from mga06.intel.com ([134.134.136.31]:57790 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752443AbdKGWrN (ORCPT ); Tue, 7 Nov 2017 17:47:13 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.44,361,1505804400"; d="scan'208";a="172825858" Subject: Re: [PATCH v9 00/51] powerpc, mm: Memory Protection Keys To: Ram Pai , Florian Weimer References: <1509958663-18737-1-git-send-email-linuxram@us.ibm.com> <87efpbm706.fsf@mid.deneb.enyo.de> <20171107012218.GA5546@ram.oc3035372033.ibm.com> <87h8u6lf27.fsf@mid.deneb.enyo.de> <20171107223953.GB5546@ram.oc3035372033.ibm.com> Cc: mpe@ellerman.id.au, mingo@redhat.com, akpm@linux-foundation.org, corbet@lwn.net, arnd@arndb.de, linux-arch@vger.kernel.org, ebiederm@xmission.com, linux-doc@vger.kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, mhocko@kernel.org, linux-mm@kvack.org, paulus@samba.org, aneesh.kumar@linux.vnet.ibm.com, linux-kselftest@vger.kernel.org, bauerman@linux.vnet.ibm.com, linuxppc-dev@lists.ozlabs.org, khandual@linux.vnet.ibm.com From: Dave Hansen Message-ID: <8b970e5b-50e6-bcc1-e8d3-6e3aa8523f55@intel.com> Date: Tue, 7 Nov 2017 14:47:10 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: <20171107223953.GB5546@ram.oc3035372033.ibm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/07/2017 02:39 PM, Ram Pai wrote: > > As per the current semantics of sys_pkey_free(); the way I understand it, > the calling thread is saying disassociate me from this key. No. It is saying: "this *process* no longer has any uses of this key, it can be reused".