From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1Mi1c0-00052H-GA for qemu-devel@nongnu.org; Mon, 31 Aug 2009 03:47:36 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1Mi1bv-00051S-1L for qemu-devel@nongnu.org; Mon, 31 Aug 2009 03:47:35 -0400 Received: from [199.232.76.173] (port=38083 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Mi1bu-00051P-TC for qemu-devel@nongnu.org; Mon, 31 Aug 2009 03:47:30 -0400 Received: from mx20.gnu.org ([199.232.41.8]:1185) by monty-python.gnu.org with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1Mi1bu-0006PY-9M for qemu-devel@nongnu.org; Mon, 31 Aug 2009 03:47:30 -0400 Received: from fmmailgate01.web.de ([217.72.192.221]) by mx20.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1Mi1bt-0006KI-Fv for qemu-devel@nongnu.org; Mon, 31 Aug 2009 03:47:29 -0400 Message-ID: <4A9B800F.1040209@web.de> Date: Mon, 31 Aug 2009 09:47:27 +0200 From: Jan Kiszka MIME-Version: 1.0 Subject: Re: [Qemu-devel] Re: Breakage with local APIC routing References: <4A938B26.5040609@web.de> <52d4a3890908250124g74e25441x262fc7926bfdbe36@mail.gmail.com> <4A93A7EC.6090704@web.de> <52d4a3890908250209y76ecaf1tf68117635a03820d@mail.gmail.com> <4A93AFF9.1060201@web.de> <52d4a3890908250316l4de68725xa9d780e7d5b37205@mail.gmail.com> <52d4a3890908250321u746e5757u136030bcbc19208d@mail.gmail.com> <4A93BF0C.8040601@web.de> <20090826221001.GA1070@triton8.kn-bremen.de> <4A96C8D9.6070804@web.de> <20090829211848.GA59305@triton8.kn-bremen.de> In-Reply-To: <20090829211848.GA59305@triton8.kn-bremen.de> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig275E00B4EC33297116964439" Sender: jan.kiszka@web.de List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Juergen Lock Cc: Mohammed Gamal , qemu-devel@nongnu.org, Avi Kivity This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig275E00B4EC33297116964439 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Juergen Lock wrote: > On Thu, Aug 27, 2009 at 07:56:41PM +0200, Jan Kiszka wrote: >> Juergen Lock wrote: >>> On Tue, Aug 25, 2009 at 12:38:04PM +0200, Jan Kiszka wrote: >>>> Mohammed Gamal wrote: >>>>> On Tue, Aug 25, 2009 at 1:16 PM, Mohammed Gamal wrote: >>>>>> On Tue, Aug 25, 2009 at 12:33 PM, Jan Kiszka wr= ote: >>>>>>> Mohammed Gamal wrote: >>>>>>>> qemu-system-x86_64 -hda /dev/null -cdrom >>>>>>>> >>>>>>> I only have kubuntu-9.04-alternate-amd64.iso at hand ATM, and wit= h that >>>>>>> image I'm unable to reproduce. Will download and check standard u= buntu >>>>>>> later today. >>>>>>> >>>>>>>> I was using qemu-kvm, but I assume that using -no-kvm would be >>>>>>>> equivalent to using plain qemu, no? >>>>>>> Generally yes, but not necessarily (e.g. the BIOSes are different= ). So >>>>>>> it's better to check such issues also against "clean" qemu, speci= fically >>>>>>> as we are on qemu-devel here. >>>>>>> >>>>>>> Jan >>>>>>> >>>>>>> >>>>>> Just tested this now on a vanilla qemu, I am still able to reprodu= ce >>>>>> the same issue. >>>>>> >>>>> This bug might be related to the same problem >>>>> https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/379000 >>>> I think at least those issues should be solved with recent qemu and >>>> bioses. Note that this report refers to a fairly old qemu version >>>> (0.10.0-derived). >>> Btw I had reported the same symptom as in that ubuntu ticket for Free= BSD 8 >>> hosts both with 0.10.6 and 0.11.0rc1 before: >>> http://lists.gnu.org/archive/html/qemu-devel/2009-08/msg00396.html >>> As mentioned in that post I was able to work around the issue by pass= ig >>> the linux guest kernels `no_timer_check' after which they seemed to b= oot up >>> just fine, so I suspect in that case its not actually an apic routing= >>> problem but just guest timer irqs arriving late/irregularly which cau= se >>> the guest kernel timer checks to time out and fail. >> Does this happen with git head and its corresponding bios, too? I cann= ot >> imagine that the FreeBSD platform is so irregularly generating timer >> events for qemu that Linux gets unhappy during this test loop (I think= >> to remember it needs 3 out of 10 ticks or so to be satisfied). >=20 > Alright so I testwise updated the FreeBSD qemu-devel port to git head > (db3c9e08e0d6eaf83f9d7a2c87dc45af3ac8f4dd, update at > http://people.freebsd.org/~nox/qemu/qemu-devel-20090829.patch You will have to help me isolating the reason as I don't have any BSD host. And running recent qemu/-kvm on Linux hosts does not trigger problems around booting ubuntu here. > ) - and can report the problem still exists. (btw pcap seems to be > broken in that patch which was stll working with the 0.11 snapshot, > will have to take care of that later...) >=20 > Thanx, > Juergen Jan --------------enig275E00B4EC33297116964439 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAkqbgA8ACgkQniDOoMHTA+klkQCfTGVXQQGZOFLLTX1AYkn944ng +R4An2zuQ8MKdA7aHBYRnPOVak26gZjV =Pt/r -----END PGP SIGNATURE----- --------------enig275E00B4EC33297116964439--