Description of problem: I am unable to boot a xen kernel (either 2.6.20-2925.9.fc7xen or 2.6.20-2931.fc7xen) on my quad core Intel x86_64 box. When I try the boot fails with a modprobe error. Unfortunately, I do not know how to enable logging to record this for debugging purposes (boot.log is always empty). Version-Release number of selected component (if applicable): xen-3.1.0-2.fc7 How reproducible: Always occurs. Steps to Reproduce: 1. Install the x86 FC7 image on the x86_64 box. 2. Include virtualization in the installation 3. Attempt to boot the xen image. Actual results: Boot fails with a modprobe error. Expected results: Xen enabled kernel should boot. Note that it does boot if I install x86_64 fc7 instead. Additional info: I don't know how to record this boot issue. /var/log/boot.log is always empty.
Please boot, adding 'noreboot' to the Xen command line, then write down the error or take a snapshot.
Created attachment 206301 [details] dmesg output from xen boot When I added the noreboot, the system eventually booted. Here is the dmesg log. When the boot failed, it stopped after displaying line 568 (floppy0: no floppy controllers found) and displayed a sys/modprobe error before that line.
Created attachment 206311 [details] messages log file from fc7xen boot Here is a bit more. I removed the noreboots and the boot hung in the same place. I discovered that if I press the Print Screen / SysRq key, the boot will continue. This attachment contains the messages log that contains more information than the previous dmesg log. This contains a modprobe error at the place that I see it when the boot hangs.
It is being caused by the Firewire stack trying to use DMA in a way not currently supported by the Xen kernel. The firewire stack was supposed to be disabled on the Xen kernel. You can work around the problem by removing the firewire modules under /lib/modules/2.6.20-2931.fc7xen/kernel/firewire.
Cloned as bug #307461 for Rawhide / Fedora 8.
Fix (disabling Firewire on i686 .config) committed to CVS. Will go to next Fedora 7 kernel-xen update (version 2.6.20-2937.fc7 or higher).
kernel-xen-2.6-2.6.20-2943.fc7 has been pushed to the Fedora 7 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update kernel-xen-2.6'
kernel-xen-2.6-2.6.20-2943.fc7 has been pushed to the Fedora 7 stable repository. If problems still persist, please make note of it in this bug report.