https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209327
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@FreeBSD.org
Reporter: kpiel...@tdx.co.uk
CC: freebsd-am...@freebsd.org
CC: freebsd-am...@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).
-Karl
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?
** DUMP FAILED (ERROR 16) **
Automatic reboot in 15 seconds - press a key on the console to abort
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