From mboxrd@z Thu Jan 1 00:00:00 1970 From: Brendan Cully Subject: Re: differences in hvm save/restore in 3.1 vs 3.2 Date: Fri, 4 Jul 2008 00:07:41 -0700 Message-ID: <20080704070741.GA26172@zanzibar.lan> References: <486DC98C.2050506@cs.ubc.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline 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: James Harper Cc: Christopher Head , xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org On Friday, 04 July 2008 at 17:03, James Harper wrote: > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA1 > > > > There's a bug in the serial port emulation in qemu related to saving > and > > restoring. There's a patch floating around somewhere which fixes it, > but > > depending on what source tree you're using you may not have it yet. > One > > of the critical registers isn't saved and also isn't regenerated at > > restore time, meaning that serial port interrupts stop getting > delivered > > to the guest properly. > > > > That sounds like the sort of problem I'm seeing. It's obviously a > regression though as it was working in 3.1. > > I'm using the Debian provided 3.2 packages but can easily apply a patch > if I can find it... I'll go searching tonight. It's probably this one: http://xenbits.xensource.com/xen-unstable.hg/rev/13e10678e714