[Bug 209327] Under XenServer 6.5 - Live Migration results in a Kernel Panic when the VM 'Lands' on the other Node

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Fri May 6 11:06:47 UTC 2016


            Bug ID: 209327
           Summary: Under XenServer 6.5 - Live Migration results in a
                    Kernel Panic when the VM 'Lands' on the other Node
           Product: Base System
           Version: 10.3-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: kpielorz at tdx.co.uk
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

When Live Migrating a FreeBSD 10.3 running VM under XenServer 6.5 - the VM
panics when it "lands" on the other node.

This works under FreeBSD 10.1-R and 10.2-R (with 'freebsd-update' patches) -
but fails for both 10.3-R and 10-STABLE.

The VM starts to migrate in XenCenter - 'lands' on the destination node (and
the XenServer console tab is connected) - but the host immediately panics then
with the output below.

I can't get a dump from this (fails, as shown below).


Fatal trap 30: reserved (unknown) fault while in kernel mode
cpuid = 0; apic id = 00
instruction pointer      = 0x20:0xffffffff80e970b1
stack pointer            = 0x28:0xfffffe002b9b0ac0
frame pointer            = 0x28:0xfffffe002b9b0af0
code segment             = base 0x0, limit 0xfffff, type 0x1b
                         = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags         = interrupt enabled, IOPL = 0
current process          = 16 (xenwatch)
[ thread pid 16 tid 100033 ]
stopped at        lapic_ipi_vectored+0xf1:    addq  $0x8,%rsp
db> trace
Tracing pid 16 tid 100033 td 0xfffff8000242e000
lapic_ipi_vectored() at lapic_ipi_vectored+0xf1/frame 0xfffffe002b9b0af0
xctrl_suspend() at xctrl_suspend+0x317/frame 0xfffffe002b9b0b40
xctrl_on_watch_event() at xtrl_on_watch_event+0x5e/frame 0xfffffe002b9b0b70
xenwatch_thread() at xenwatch_thread+0x1cf/frame 0xfffffe002b9b0bb0
fork_exit() at fork_exit+0x9a/frame 0xfffffe002b9b0bf0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe002b9b0bf0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
db> panic
Uptime 2m22s
Dumping 71 out of 483 MB: xbd0: dump: no more commands?

Automatic reboot in 15 seconds - press a key on the console to abort

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