From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031765Ab2CGBNi (ORCPT ); Tue, 6 Mar 2012 20:13:38 -0500 Received: from e31.co.us.ibm.com ([32.97.110.149]:60748 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031740Ab2CGBNg (ORCPT ); Tue, 6 Mar 2012 20:13:36 -0500 Message-ID: <1331082811.2191.167.camel@work-vm> Subject: Re: WARNING: Adjusting tsc more then 11% From: John Stultz To: Sasha Levin Cc: Dave Jones , Fedora Kernel Team , Linux Kernel , Thomas Gleixner Date: Tue, 06 Mar 2012 17:13:31 -0800 In-Reply-To: References: <20120305154411.GA29668@redhat.com> <1330972323.2191.74.camel@work-vm> <20120305192338.GA30491@redhat.com> <1330977010.2191.84.camel@work-vm> <20120305195758.GA25498@redhat.com> <1330979254.2191.98.camel@work-vm> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.2.2- Content-Transfer-Encoding: 7bit Mime-Version: 1.0 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12030701-7282-0000-0000-0000072671A7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 2012-03-05 at 22:36 +0200, Sasha Levin wrote: > On Mon, Mar 5, 2012 at 10:27 PM, John Stultz wrote: > > On Mon, 2012-03-05 at 22:16 +0200, Sasha Levin wrote: > >> On Mon, Mar 5, 2012 at 9:57 PM, Dave Jones wrote: > >> > On Mon, Mar 05, 2012 at 11:50:10AM -0800, John Stultz wrote: > >> > > >> > > So it would be great to get further feedback from folks who are seeing > >> > > this warning, so we can really hammer this out, but I don't want the > >> > > warning spooking anyone into thinking things are terribly broken. > >> > > >> > One of the reports was from someone using vbox. I'm now wondering if > >> > the other users are using some other flavour of virt. I'll ask. > >> > >> I've reported this issue with regards to KVM before > >> (http://permalink.gmane.org/gmane.comp.emulators.kvm.devel/85632) but > >> according to this thread it's not really KVM specific. > >> > >> It's easily reproducible using Dave's trinity running inside a KVM guest. > > > > Great! Do you have a link to trinity? (Google just gives me a video of > > its use and links to various churches) > > Sure, the git tree is here: codemonkey.org.uk/projects/trinity/trinity.git > > Basically just start 2*vcpu instances of trinity inside the guest and > wait a bit. So I left trinity running in a 2vcpu kvm guest for ~5 hours and haven't seen anything yet. Could you send me a .config for the guest kernel and maybe your kvm command line? Also, it shouldn't really matter, but are the guests 32bit or 64bit? thanks -john