Re: Xen HVM Panic, HEAD

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On 02/17/15 00:56, Konstantin Belousov wrote:
> On Mon, Feb 16, 2015 at 08:10:06PM -0800, Sean Bruno wrote:
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>> https://people.freebsd.org/~sbruno/Xen_APIC_panic.png
>> 
>> I suspect that there may be one or two more lines above this that
>> are relevant to this panic, but XENHVM kernel's now panic booting
>> on Xen server.  The working kernel output looks like this:
>> 
>> FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032)
>> 20140512 XEN: Hypervisor version 4.2 detected. CPU: Intel(R)
>> Xeon(R) CPU           E5620  _at_ 2.40GHz (2400.05-MHz K8-class
>> CPU) Origin="GenuineIntel"  Id=0x206c2  Family=0x6  Model=0x2c
>> Stepping=2 
>> Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT>
>>
>> 
Features2=0x81ba2201<SSE3,SSSE3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,HV>
>> AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM> AMD
>> Features2=0x1<LAHF> Hypervisor: Origin = "XenVMMXenVMM" real
>> memory  = 1434451968 (1368 MB) avail memory = 1353293824 (1290
>> MB) Event timer "LAPIC" quality 400 ACPI APIC Table: <Xen HVM> 
>> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs FreeBSD/SMP:
>> 1 package(s) x 2 core(s) cpu0 (BSP): APIC ID:  0 cpu1 (AP): APIC
>> ID:  2 ioapic0: Changing APIC ID to 1 MADT: Forcing active-low
>> polarity and level trigger for SCI
> I am not sure why your machine uses native lapic instead of xen
> lapic, and should it be other way, or not.
> 
> Regardless, show the line number for the ipi_startup+0x56. Did you
> performed clean kernel build ?
> 
> 

I have rebuilt a kernel/world based on head at svn r276627.  I have
delete /usr/obj completely and started from scratch.

Updated kernelpanic image at
https://people.freebsd.org/~sbruno/Xen_APIC_panic.png

/usr/src/sys/x86/include # kgdb /boot/kernel/kernel
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This GDB was configured as "amd64-marcel-freebsd"...
(kgdb) list *(ipi_startup+0x56)
0xffffffff80e088c6 is in ipi_startup (apicvar.h:383).
378	
379	static inline int
380	lapic_ipi_wait(int delay)
381	{
382	
383		return (apic_ops.ipi_wait(delay));
384	}
385	
386	static inline int
387	lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked)



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