From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754872AbaCYSao (ORCPT ); Tue, 25 Mar 2014 14:30:44 -0400 Received: from smtp02.citrix.com ([66.165.176.63]:27865 "EHLO SMTP02.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753434AbaCYSan (ORCPT ); Tue, 25 Mar 2014 14:30:43 -0400 X-IronPort-AV: E=Sophos;i="4.97,730,1389744000"; d="scan'208";a="113474072" Message-ID: <5331CB50.9000306@citrix.com> Date: Tue, 25 Mar 2014 18:30:40 +0000 From: David Vrabel User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.16) Gecko/20121215 Iceowl/1.0b1 Icedove/3.0.11 MIME-Version: 1.0 To: Konrad Rzeszutek Wilk CC: , , , , David Sutton , "xen-devel@lists.xen.org" , Subject: Re: [Xen-devel] [PATCH 1/2] Revert "xen: properly account for _PAGE_NUMA during xen pte translations" References: <5331B94F.9020601@citrix.com> <20140325181939.GA11073@phenom.dumpdata.com> In-Reply-To: <20140325181939.GA11073@phenom.dumpdata.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.80.2.76] X-DLP: MIA2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/03/14 18:19, Konrad Rzeszutek Wilk wrote: > > With that in mind I was wondering whether it would be possible to revert > Mel's 1667918b6483 ("mm: numa: clear numa hinting information on mprotect") > so there is a bit more time in 3.15 to re-introduce his patch and also a > proper fix so that Xen guests won't fall flat on their face? Unfortunately, I think this can only be safely reverted on architectures with ARCH_WANTS_PROT_NUMA_PROT_NONE (x86) and would cause regressions on other architectures with only ARCH_SUPPORTS_NUMA_BALANCING (powerpc). David