From mboxrd@z Thu Jan 1 00:00:00 1970 From: Michael Riepe Subject: Re: Talking about regressions... Date: Mon, 15 Jan 2007 19:38:02 +0100 Message-ID: <45ABCA0A.7040905@mr511.de> References: <45AA63B2.5060900@mr511.de> <64F9B87B6B770947A9F8391472E0321603496B00@ehost011-8.exch011.intermedia.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: To: Uri Lublin In-Reply-To: <64F9B87B6B770947A9F8391472E0321603496B00-yEcIvxbTEBqsx+V+t5oei8rau4O3wl8o3fe8/T/H7NteoWH0uzbU5w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Hi! Uri Lublin wrote: > > Thanks for running those tests. > Does kvm complains ( dmesg ) ? Not in the cases I listed. The host just becomes very busy, for a long time. After ~30 minutes I lost patience and killed qemu. I see a single "kvm: emulating exchange as write" when I try to boot FreeBSD 6.1, and with Knoppix 5.1.1 the kernel reports "kvm: unhandled wrmsr: 0xc1" once. Neither of these worked with earlier kvm versions, though. Interestingly, Knoppix 5.1.1 *does* work on an AMD Quad Dual-Core Opteron we have at work (running Suse Linux Enterprise Server 10, as far as I remember). Knoppix 5.0, on the other hand, which works fine on the Core Duo, needs "acpi=off" as a boot parameter on the AMD. More AMD results: FreeBSD, NetBSD and OpenSolaris (32-bit versions) all fail with exceptions, usually page faults. OpenSolaris catches lots of SIGILL's. OpenSuse 10.2 (32 bit as well) works, even with gfxmenu enabled. Qemu-puppy behaves the same as on the Intel CPU - the old version works, the new one sometimes hangs (and at the same point). The next thing I'm going to try is the Dual Quad-Core Xeon... as soon as I can get my hands on it. :-) > -----Original Message----- > From: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org on behalf of Michael Riepe > Sent: Sun 14/01/2007 19:09 > To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > Subject: [kvm-devel] Talking about regressions... > > When I did a couple of tests the other day, I noticed that one or more > bugs must have been introduced at least into the vmx part in kvm-10: > > - netbsd 3.1 used to work with kvm-9. In kvm-10, the system hangs during > boot. One of the last things I can see is that a shell process dies with > a SIGSEGV. Then the load rises to 100% (sys) on the host and stays there > until I kill qemu (yes I've waited several minutes). > > - opensolaris displays a "Time of Day clock error" during boot, claiming > the clock has jumped by 0x5 (no unit given, I suppose that means > seconds). Everything else seems to work. > > - qemu-puppy-2.13-1 sometimes works and sometimes hangs somewhere inside > the initial ramdisk. The exact place seems to differ, but usually it > happens while the kernel modules are loaded. Again, host load rises to > 100%. An older version (2.01-3) still works fine. kvm-9 works, too. > > (Core Duo T2400, 32-bit SMP host, 32-bit guest, Linux 2.6.19 + kvm trunk > revision 4290) > > Any idea what to look for? The SIGSEGV on netbsd makes me suspect that > there's a problem with the page tables, but I couldn't narrow down the > cause yet. > > -- > Michael "Tired" Riepe > X-Tired: Each morning I get up I die a little > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > kvm-devel mailing list > kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org > https://lists.sourceforge.net/lists/listinfo/kvm-devel > > -- Michael "Tired" Riepe X-Tired: Each morning I get up I die a little ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV