http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=953

Summary: Xen0 hang sometimes & a lot of calltraces will be printed on serial Product: Xen Version: unstable Platform: Other OS/Version: All Status: NEW Severity: normal Priority: P1 Component: Hypervisor AssignedTo: xen-...@lists.xensource.com ReportedBy: yunf...@intel.com

Environment: ------------ Service OS (ia32/ia32e/IA64):IA32e Guest OS (ia32/ia32e/IA64): Change Set: 14756 Hardware: woodcrest

Bug detailed description: --------------------------

xen0 hang sometimes when I run nightly testing, but I can ping it, can not login in by ssh, and also can not login in by physical console. The serial output tell us that it is a bug. Reproduce steps: ---------------- 1. run nightly testing

Current result: ----------------

Expected result: ----------------

Basic root-causing log: ---------------------- BUG: soft lockup detected on CPU#1!

Call Trace: <IRQ> [<ffffffff802583b5>] softlockup_tick+0xcc/0xde [<ffffffff8020e851>] timer_interrupt+0x3a3/0x401 [<ffffffff802589e4>] handle_IRQ_event+0x4b/0x93 [<ffffffff80258aca>] __do_IRQ+0x9e/0x100 [<ffffffff8020cc9b>] do_IRQ+0x63/0x71 [<ffffffff8034b8a7>] evtchn_do_upcall+0xee/0x165 [<ffffffff8020abca>] do_hypervisor_callback+0x1e/0x2c <EOI> [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000 [<ffffffff802063aa>] hypercall_page+0x3aa/0x1000 [<ffffffff8020ef27>] raw_safe_halt+0xb7/0xdd [<ffffffff802082c3>] xen_idle+0x67/0x79 [<ffffffff8020837f>] cpu_idle+0xaa/0xc