From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934964AbcLUSR4 (ORCPT ); Wed, 21 Dec 2016 13:17:56 -0500 Received: from asavdk3.altibox.net ([109.247.116.14]:45135 "EHLO asavdk3.altibox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbcLUSRz (ORCPT ); Wed, 21 Dec 2016 13:17:55 -0500 Date: Wed, 21 Dec 2016 19:17:51 +0100 From: Sam Ravnborg To: Mike Kravetz Cc: David Miller , sparclinux@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, bob.picco@oracle.com, nitin.m.gupta@oracle.com, vijay.ac.kumar@oracle.com, julian.calaby@gmail.com, adam.buchbinder@gmail.com, kirill.shutemov@linux.intel.com, mhocko@suse.com, akpm@linux-foundation.org Subject: Re: [RFC PATCH 04/14] sparc64: load shared id into context register 1 Message-ID: <20161221181751.GE3311@ravnborg.org> References: <1481913337-9331-1-git-send-email-mike.kravetz@oracle.com> <1481913337-9331-5-git-send-email-mike.kravetz@oracle.com> <20161217.221442.430708127662119954.davem@davemloft.net> <62091365-2797-ed99-847f-7281f4666633@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <62091365-2797-ed99-847f-7281f4666633@oracle.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-CMAE-Score: 0 X-CMAE-Analysis: v=2.2 cv=WJY9ZTkR c=1 sm=1 tr=0 a=Ij76tQDYWdb01v2+RnYW5w==:117 a=Ij76tQDYWdb01v2+RnYW5w==:17 a=kj9zAlcOel0A:10 a=clwOd2xMjbKCxG7CpaMA:9 a=CjuIK1q_8ugA:10 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Mike. > Or, perhaps we only enable > the shared context ID feature on processors which have the ability to work > around the backwards compatibility feature. Start out like this, and then see if it is really needed with the older processors. This should keep the code logic simpler - which is always good for this complicated stuff. Sam