[Xen-devel] double fault in xen

[Kurt Hackel <kurt.hackel@xxxxxxxxxx>]

Hi,

I'm hitting a double fault in the hypervisor with cs 14462 while running
a perl monitoring script that hits a bunch of /proc entries.  Looks like this:

(XEN) *** DOUBLE FAULT ***
(XEN) ----[ Xen-3.0-unstable  x86_64  debug=n  Not tainted ]----
(XEN) CPU:    3
(XEN) RIP:    e008:[<ffff830000178476>] handle_exception+0x16/0x18
(XEN) RFLAGS: 0000000000010086
(XEN) rax: ffff88001a523f28   rbx: 0000000000000000   rcx: ffff83000013e100
(XEN) rdx: 0000000000000000   rsi: ffff8300001964a0   rdi: ffff88001a5220f8
(XEN) rbp: ffff88001a5220f8   rsp: ffff88001a522000   r8: 0000000000000000
(XEN) r9:  0000000000000000   r10: 0000000000000000   r11: 0000000000000256
(XEN) r12: 0000000000000010   r13: 0000000000000000   r14: ffff8300001bb2a0
(XEN) r15: 0000000000000000
(XEN)
(XEN) ****************************************
(XEN) Panic on CPU 3:
(XEN) DOUBLE FAULT -- system shutdown
(XEN) ****************************************
(XEN)
(XEN) Reboot in five seconds...

I have the saved-off vmcore, but haven't been able to do much with it
yet.  In gdb I can disassemble functions in the 0xffff83- range but I
can't inspect data at 0xffff88-.  Any advice on debugging would be much
appreciated.

Thanks
kurt

Kurt C. Hackel | Principal Software Developer | 650.506.0681
Oracle Corporate Architecture - Linux Engineering
500 Oracle Parkway M/S 5OP3 Redwood Shores California 94065

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