Xen HVM Panic, HEAD
Konstantin Belousov
kostikbel at gmail.com
Tue Feb 17 20:27:00 UTC 2015
On Tue, Feb 17, 2015 at 12:00:04PM -0800, Sean Bruno wrote:
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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:
> >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
> >>
> >> 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 @ 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)
>
Please disassemble your ipi_startup, also please do 'p *apic_ops'.
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