From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48610) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XrOXp-0007WF-M7 for qemu-devel@nongnu.org; Thu, 20 Nov 2014 05:01:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XrOXg-0002As-42 for qemu-devel@nongnu.org; Thu, 20 Nov 2014 05:00:57 -0500 Received: from mail-lb0-x22f.google.com ([2a00:1450:4010:c04::22f]:40528) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XrOXf-0002AK-KJ for qemu-devel@nongnu.org; Thu, 20 Nov 2014 05:00:47 -0500 Received: by mail-lb0-f175.google.com with SMTP id n15so1934488lbi.20 for ; Thu, 20 Nov 2014 02:00:46 -0800 (PST) Sender: Paolo Bonzini Message-ID: <546DBBC9.1010506@redhat.com> Date: Thu, 20 Nov 2014 11:00:41 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1416254843-16859-3-git-send-email-mst@redhat.com> <546AE14E.7060606@redhat.com> <20141118074904.GA19745@redhat.com> <87y4r7o8dh.fsf@elfo.elfo> <20141119093320.GA26119@redhat.com> <87d28jo5yp.fsf@elfo.elfo> <20141119102136.GC26395@redhat.com> <878uj7o4ec.fsf@elfo.elfo> <20141119132851.GA27435@redhat.com> <546C9EC0.5000105@redhat.com> <20141119162712.GA19365@morn.localdomain> <546CCCD2.8050507@redhat.com> <1416471139.19765.6.camel@nilsson.home.kraxel.org> In-Reply-To: <1416471139.19765.6.camel@nilsson.home.kraxel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 2/5] exec: qemu_ram_alloc_device, qemu_ram_resize List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann Cc: Kevin O'Connor , "Michael S. Tsirkin" , qemu-devel@nongnu.org, dgilbert@redhat.com, Juan Quintela On 20/11/2014 09:12, Gerd Hoffmann wrote: > Hi, > >> I don't know why RHEL7 SeaBIOS does not work on RHEL6. But note that >> it's a really old version (0.12). > > Hmm, works for me on a quick smoke test. Do you remember what exactly > broke and which version it was? Maybe the 1.7.2 -> 1.7.5 update fixed > it? Possibly. I tested 1.7.2 about a month ago and it failed. > Or was it live-migration by chance? rhel6 qemu doesn't emulate pam > registers correctly, and seabios has a workaround for that. So > live-migrating between versions with and without correct pam emulation > creates some *ahem* very interesting corner cases ... No, it was not live migration. Laszlo found it when he was trying to identify a live migration bug as a QEMU bug or SeaBIOS bug; but he didn't even get to the point of doing live migration. :) Paolo