On February 1, 2012 at 2:40 PM Avi Kivity <avi@xxxxxxxxxx> 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 <avi@xxxxxxxxxx> > > > > > > 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 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
