From mboxrd@z Thu Jan 1 00:00:00 1970 From: Igor Mammedov Subject: Re: [SeaBIOS] [RFC PATCH] Add _PXM to CPU objects for NUMA hot-plug Date: Wed, 6 Nov 2013 13:54:15 +0100 Message-ID: <20131106135415.1207cabb@nial.usersys.redhat.com> References: <1382693530-31137-1-git-send-email-vasilis.liaskovitis@profitbricks.com> <20131104105149.GB30503@dhcp-192-168-178-175.profitbricks.localdomain> <1383596774.1847.12.camel@misato.fc.hp.com> <20131105102029.GA3933@shadowkeep> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mx1.redhat.com ([209.132.183.28]:28083 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756350Ab3KFMym (ORCPT ); Wed, 6 Nov 2013 07:54:42 -0500 In-Reply-To: <20131105102029.GA3933@shadowkeep> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Vasilis Liaskovitis Cc: Toshi Kani , thilo.fromm@profitbricks.com, seabios@seabios.org, rjw@sisk.pl, linux-acpi@vger.kernel.org On Tue, 5 Nov 2013 12:20:29 +0200 Vasilis Liaskovitis wrote: [...] > > > > This issue may require a kernel fix alternatively or additionally to the seabios > > > > fix: The kernel can save the originally parsed SRAT entry info somewhere before > > > > it resets it at hot-remove time, and use that info on hot-plug time if the _PXM > > > > value is missing for the hot-plugged CPU BIOS object. This way CPU hot-plug > > > > works well against a BIOS with no CPU _PXM info. > > > > To support CPU hotplug, seabios needs to implement _PXM to CPU or its > > parent device object when the system has multiple nodes. BTW: may we should compare linux behavior with Windows's one. usually MS implements ACPI spec more strictly. > ok, so no linux kernel changes are needed. Only adding PXM to seabios CPUs > objects should be enough, which is what this RFC patch does. > > thanks, > > - Vasilis > > > > > > > > > > _______________________________________________ > SeaBIOS mailing list > SeaBIOS@seabios.org > http://www.seabios.org/mailman/listinfo/seabios