From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:55072) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RsamD-0007nS-LF for qemu-devel@nongnu.org; Wed, 01 Feb 2012 09:03:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Rsam6-00058g-Ci for qemu-devel@nongnu.org; Wed, 01 Feb 2012 09:03:09 -0500 Received: from moutng.kundenserver.de ([212.227.17.9]:53631) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rsam5-00058E-Ui for qemu-devel@nongnu.org; Wed, 01 Feb 2012 09:03:02 -0500 Date: Wed, 1 Feb 2012 15:02:56 +0100 (CET) From: Erik Rull Message-ID: <977314087.203900.1328104976777.JavaMail.open-xchange@email.1und1.de> In-Reply-To: <4F2940DD.5090807@redhat.com> References: <923364617.199626.1328100735285.JavaMail.open-xchange@email.1und1.de> <4F2940DD.5090807@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] git bisect results: ec757c67c40a56492001487e69272f62144fd124 breaks windows boot in qemu-kvm Reply-To: Erik Rull List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Avi Kivity Cc: "qemu-devel@nongnu.org" , "kvm@vger.kernel.org" On February 1, 2012 at 2:40 PM Avi Kivity wrote: > On 02/01/2012 02:52 PM, Erik Rull wrote: > > Hi all, > > > > first of all I'm a bit confused: > > > > What is the difference between qemu with command line option --enable-kvm > > and qemu-kvm? > > It seems to be a difference in code so far, from the performance point of > > view it seems to be the same... > > The differences are being reduced rapidly, thanks to Jan's efforts. > Right now what remains is PIT performance and accuracy, device > assignment, and Windows XP performance. Most guests should see the same > performance. > > > Now my issue that lead me to a git bisect on qemu-kvm: > > The following commit / merge breaks my windows guest boot sequence and > > causes resets infinitely: > > ec757c67c40a56492001487e69272f62144fd124 Merge branch 'upstream-merge' into > > next > > Thu, 5 Jan 2012 11:00:07 +0000 (13:00 +0200) Avi Kivity > > > > > > Interesting: qemu with --enable-kvm master and the same command line > > options as qemu-kvm runs perfect. > > My command line options are: > > qemu-system-x86_64 -serial /dev/ttyS2 -readconfig /etc/ich9-ehci-uhci.cfg > > -device usb-host,bus=ehci.0 -device usb-tablet -drive > > file=/dev/sda2,cache=off -m 1024 -net nic,macaddr=$MACADDR -net > > tap,script=/etc/qemu-ifup -no-acpi -monitor stdio -L /usr/X11R6/share/qemu > > -boot c -localtime > > > > > > What version of Windows are you using? What's the contents of > /etc/ich9-ehci-uhci.cfg? > Hi Avi, the contents from the .cfg are located in docs/ich9-ehci-uhci.cfg I tried two versions of Windows XP: One is the default Windows XP SP3 that you get from MSDN, one is Windows Embedded Standard (embedded customized XP). Both show the same behavior: boots with qemu -enable-kvm and continuously reboots with qemu-kvm. Best regards, Erik