Re: KDB panic with 2 vcpus

On Wed, 2009-01-21 at 20:14 +0100, Mister Olli wrote:
> Hi..
> 
> I'm currently trying to setup FreeBSD 8-CURRENT as a para-virtualized
> domU on XEN 3.3.0 (with gentoo dom0).
> 
> When I configure 2 CPU's (using vcpus=2) in the domU config file, I get
> the following error during bootup:
> ==========================================================================
> virt-001 template_8-CURRENT # xm create -c 00_template_8-CURRENT.XENconfig
> Using config file "./00_template_8-CURRENT.XENconfig".
> Started domain template_8-CURRENT
> WARNING: loader(8) metadata is missing!
> GDB: no debug ports present
> KDB: debugger backends: ddb
> KDB: current backend: ddb
> Copyright (c) 1992-2009 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>         The Regents of the University of California. All rights reserved.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 8.0-CURRENT #0: Wed Jan 14 21:47:10 CET 2009
>     root_at_template-8_CURRENT.localdomain:/usr/obj/usr/src/sys/freebsd8_XEN
> WARNING: WITNESS option enabled, expect reduced performance.
> Xen reported: 1600.056 MHz processor.
> Timecounter "ixen" frequency 1000000000 Hz quality 0
> CPU: AMD Athlon(tm) Processor (1600.06-MHz 686-class CPU)
>   Origin = "AuthenticAMD"  Id = 0x662  Stepping = 2
>   Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
>   AMD Features=0xc0480800<SYSCALL,MP,MMX+,3DNow!+,3DNow!>
> real memory  = 268435456 (256 MB)
> avail memory = 256045056 (244 MB)
> gdtpfn=3e2d8 pdptpfn=28a43
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
>  cpu0 (BSP): APIC ID:  0
>  cpu1 (AP): APIC ID:  1
> cpu=0 irq=0 vector=0
> cpu=0 irq=0 vector=1
> cpu=1 irq=0 vector=0
> cpu=1 irq=0 vector=1
> kbd0 at kbdmux0
> xenbus0: <Xen Devices> on motherboard
> xc0: <Xen Console> on motherboard
> Timecounters tick every 100.000 msec
> xbd0: 5120MB <Virtual Block Device> at device/vbd/768 on xenbus0
> xbd0: attaching as ad0
> xn0: <Virtual Network Interface> at device/vif/0 on xenbus0
> xn0: Ethernet address: 00:16:3e:11:4d:c4
> GEOM: ad0s1: geometry does not match label (16h,63s != 255h,63s).
> [XEN] netfront_backend_changed: newstate=2
> [XEN] netfront_backend_changed: newstate=4
> Spanic: blockable sleep lock (sleep mutex) XCONS LOCK _at_ /usr/src/sys/dev/xen/console/console.c:290
> cpuid = 1
> KDB: enter: panic
> [thread pid 11 tid 100003 ]
> Stopped at      kdb_enter+0x3a: movl    $0,kdb_why
> db> 

At this point, can you enter the following commands and show the result?

bt
show alllocks

Thanks,

Gavin