kernel panic

Joe Talbott josepht at
Thu May 10 14:16:31 PDT 2007

I updated to the latest HEAD as of yesterday (2007-05-09) after the
INET6 fix.  

$uname -a
DragonFly 1.9.0-DEVELOPMENT DragonFly
1.9.0-DEVELOPMENT #135: Wed May  9 23:29:57 EDT 2007
root at  i386

I got the following kernel panic:

Fatal trap 19: non-maskable interrupt trap while in kernel mode
mp_lock = 00000000; cpuid = 0; = 00000000
instruction pointer     = 0x8:0xc02f6a1e
stack pointer           = 0x10:0xcade4a44
frame pointer           = 0x10:0xcade4a68
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, IOPL = 0
current process         = 729 (ifconfig)
current thread          = pri 6 
 <- SMP: XXX

It looks like the stack was corrupted but I was able to get this:

(kgdb) bt
#0  0x00000000 in ?? ()
(kgdb) info locals 
No symbol table info available.
(kgdb) x 0xc02f6a1e
0xc02f6a1e <agp_intel_flush_tlb+35>:    0x81028b90

I can upload the kernel and vmcore files if absolutely necessary but
the vmcore file is 1.6GB uncompressed so if I don't need to I will
save the bandwidth.

Perhaps unrelated, but just in case.  I got this out of the kernel

[diagnostic] cache_lock: blocked on 0xdc583e28 "utils"

I have also had a cvs process hang in the "vnode" state.  I was unable
to attach the process with gdb (this just seemed to hang) or get any
output from ktrace.

Joe Talbott

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