http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=430

------- Additional Comments From jun....@intel.com 2005-12-15 22:06
------- I quicly looked at irqbalance code, and I guess this is an issues with irqbalance that assumes #define MAX_INTERRUPTS 256

which is not true on XenLinux. Since irqbalance is not required on domU, I think a better way (rather than changing the kernel code) is just to disable irqbalance.

But one thing you can check is just increase MAX_INTERRUPTS (like 512) and to see how it goes.