Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751459AbVIVI6o (ORCPT ); Thu, 22 Sep 2005 04:58:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751460AbVIVI6o (ORCPT ); Thu, 22 Sep 2005 04:58:44 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:454 "EHLO mx2.mail.elte.hu") by vger.kernel.org with ESMTP id S1751459AbVIVI6n (ORCPT ); Thu, 22 Sep 2005 04:58:43 -0400 Date: Thu, 22 Sep 2005 10:59:31 +0200 From: Ingo Molnar To: Zachary Amsden Cc: Linus Torvalds , Jeffrey Sheldon , Ole Agesen , Shai Fultheim , Andrew Morton , Jack Lo , Linux Kernel Mailing List , Virtualization Mailing List , Chris Wright , Martin Bligh , Pratap Subrahmanyam , Christopher Li , "H. Peter Anvin" , Zwane Mwaikambo , Andi Kleen Subject: Re: [PATCH 3/3] Gdt page isolation Message-ID: <20050922085931.GC25909@elte.hu> References: <200509220749.j8M7nINV001001@zach-dev.vmware.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200509220749.j8M7nINV001001@zach-dev.vmware.com> User-Agent: Mutt/1.4.2.1i X-ELTE-SpamScore: 0.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=0.0 required=5.9 tests=AWL autolearn=disabled SpamAssassin version=3.0.4 0.0 AWL AWL: From: address is in the auto white-list X-ELTE-VirusStatus: clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 792 Lines: 22 * Zachary Amsden wrote: > Make GDT page aligned and page padded to support running inside of a > hypervisor. This prevents false sharing of the GDT page with other > hot data, which is not allowed in Xen, and causes performance problems > in VMware. > > Rather than go back to the old method of statically allocating the GDT > (which wastes unneded space for non-present CPUs), the GDT for APs is > allocated dynamically. > > Signed-off-by: Zachary Amsden Acked-by: Ingo Molnar Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/