From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Magenheimer Subject: RE: xen tsc problems? Date: Tue, 13 Jul 2010 12:32:27 -0700 (PDT) Message-ID: <756423e2-fa59-4f9e-bc17-e0d6ff575197@default> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser , Stefano Stabellini Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > From: Keir Fraser [mailto:keir.fraser@eu.citrix.com] > Sent: Tuesday, July 13, 2010 12:59 PM > To: Stefano Stabellini; Dan Magenheimer > Cc: xen-devel@lists.xensource.com > Subject: Re: [Xen-devel] xen tsc problems? >=20 > On 13/07/2010 19:14, "Stefano Stabellini" > > wrote: >=20 > > On Tue, 13 Jul 2010, Dan Magenheimer wrote: > >> /me wonders if timer_mode=3D1 is the default for xl? > >> Or only for xm? > > > > no, it is not. > > Xl defaults to 0, I am going to change it right now. >=20 > Possibly we should make timer_mode=3D1 the default in Xen as well, and > actually disallow setting it to 0. Clearly no good comes of it. IIRC from >2 years ago, timer_mode=3D0 was best for older HVM 32-bit Linux guests. Obviously if the code (interacting with the tsc code) has bit-rotted, "best" is a relative term. :-) Dan