Sun Fire X4800 Server Product Notes

SLES11 with Xen Hangs When Many PCIe ExpressModule Cards Are Installed (CR 6917397)

SUSE Linux Enterprise Server 11 (SLES11) hangs with udev in dom0 when the number of interrupt resources required by I/O devices exceeds a threshold. This is most likely in systems where many PCIe ExpressModule cards are installed.

Workaround

1. In the GRUB configuration, set pci=nomsi.

2. Boot a non-Xen kernel.

3. Edit /boot/grub/menu.lst.

4. Add the following text to the Xen kernel init line stanza:

   pci=nomsi

   For example:

   title Xen -- SUSE Linux Enterprise Server 11 - 2.6.27.19-5
       root (hd0,1)
       kernel /boot/xen.gz
       module /boot/vmlinuz-2.6.27.19-5-xen nn.nn.n ... other text, parameters, etc pci=nomsi 
       module /boot/initrd-2.6.27.19-5-xen

   or

   Use YAST to add pci=nomsi as a boot parameter.

5. Reboot the Xen kernel.