From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [PATCH] x86: rework hypercall argument translation area setup Date: Thu, 21 Feb 2013 13:12:17 +0000 Message-ID: References: <512629A702000078000BFEBF@nat28.tlf.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <512629A702000078000BFEBF@nat28.tlf.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Jan Beulich Cc: xen-devel List-Id: xen-devel@lists.xenproject.org On 21/02/2013 13:05, "Jan Beulich" wrote: >>>> On 21.02.13 at 13:57, Keir Fraser wrote: >> On 21/02/2013 12:26, "Jan Beulich" wrote: >>> Are we concerned about the performance of guest GDT/LDT page >>> (un)mappings? >> >> LDT must often change on guest process context switch? So I would think yes >> we do. > > Linux doesn't normally use an LDT (i.e. only exotic processes > would have one of non-zero size). That being the case, we probably don't care so much. -- Keir > Jan >