From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-we0-f177.google.com (mail-we0-f177.google.com [74.125.82.177]) by kanga.kvack.org (Postfix) with ESMTP id CFD276B0073 for ; Wed, 18 Jun 2014 02:12:36 -0400 (EDT) Received: by mail-we0-f177.google.com with SMTP id u56so300107wes.22 for ; Tue, 17 Jun 2014 23:12:36 -0700 (PDT) Received: from mail-wi0-f182.google.com (mail-wi0-f182.google.com [209.85.212.182]) by mx.google.com with ESMTPS id vo10si1223493wjc.86.2014.06.17.23.12.34 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 17 Jun 2014 23:12:35 -0700 (PDT) Received: by mail-wi0-f182.google.com with SMTP id bs8so464112wib.15 for ; Tue, 17 Jun 2014 23:12:34 -0700 (PDT) Date: Wed, 18 Jun 2014 09:12:30 +0300 From: Gleb Natapov Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm. Message-ID: <20140618061230.GA10948@minantech.com> References: <1403070600-6083-1-git-send-email-tangchen@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1403070600-6083-1-git-send-email-tangchen@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: Tang Chen Cc: pbonzini@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, mgorman@suse.de, yinghai@kernel.org, isimatu.yasuaki@jp.fujitsu.com, guz.fnst@cn.fujitsu.com, laijs@cn.fujitsu.com, kvm@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org On Wed, Jun 18, 2014 at 01:50:00PM +0800, Tang Chen wrote: > [Questions] > And by the way, would you guys please answer the following questions for me ? > > 1. What's the ept identity pagetable for ? Only one page is enough ? > > 2. Is the ept identity pagetable only used in realmode ? > Can we free it once the guest is up (vcpu in protect mode)? > > 3. Now, ept identity pagetable is allocated in qemu userspace. > Can we allocate it in kernel space ? What would be the benefit? > > 4. If I want to migrate these two pages, what do you think is the best way ? > I answered most of those here: http://www.mail-archive.com/kvm@vger.kernel.org/msg103718.html -- Gleb. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org