From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58875) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WYjQn-0001xm-M7 for qemu-devel@nongnu.org; Fri, 11 Apr 2014 17:56:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WYjQh-000348-Io for qemu-devel@nongnu.org; Fri, 11 Apr 2014 17:56:17 -0400 Message-ID: <1397253344.31160.14.camel@pasglop> From: Benjamin Herrenschmidt Date: Sat, 12 Apr 2014 07:55:44 +1000 In-Reply-To: <5347B892.5010107@suse.de> References: <1396530891-6352-1-git-send-email-aik@ozlabs.ru> <1396530891-6352-5-git-send-email-aik@ozlabs.ru> <53468FBD.6040906@suse.de> <5346AB55.8030807@ozlabs.ru> <5347B892.5010107@suse.de> Content-Type: text/plain; charset="UTF-8" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 4/4] spapr: Add support for time base offset migration List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alexander Graf Cc: Alexey Kardashevskiy , Paul Mackerras , qemu-ppc , qemu-devel@nongnu.org On Fri, 2014-04-11 at 11:40 +0200, Alexander Graf wrote: > > And G5 uses 33333333. I really do not understand why it is bad to > > send-and-check timer frequency. Why? > > Because the guest will continue to run at a different TB frequency on > the new host and break. Right, which is why we should send it accross so it can be checked and we can barf accordingly rather than having random odd things happen :-) Ben.