Re: ia64/171814: [panic] bioq_init or bioq_remove (unsure which)

On Thursday, September 20, 2012 1:37:14 pm Paul Procacci wrote:
> 
> >Number:         171814
> >Category:       ia64
> >Synopsis:       [panic] bioq_init or bioq_remove (unsure which)
> >Confidential:   no
> >Severity:       non-critical
> >Priority:       low
> >Responsible:    freebsd-ia64
> >State:          open
> >Quarter:        
> >Keywords:       
> >Date-Required:
> >Class:          sw-bug
> >Submitter-Id:   current-users
> >Arrival-Date:   Thu Sep 20 17:40:03 UTC 2012
> >Closed-Date:
> >Last-Modified:
> >Originator:     Paul Procacci
> >Release:        9.0-RELEASE-p3
> >Organization:
> Datapipe
> >Environment:
> FreeBSD db1.xxxxxxxxxxxxx.com 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue 
Jun 12 02:52:29 UTC 2012     root@amd64-
builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  amd64
> >Description:
> cpuid = 5; acpic id = 13
> fault virtual address      = 0x20
> fault code                 = supervisor read data, page not present
> instruction pointer        = 0x20 :0xffffffff80865023
> stack pointer              = 0x28 :0xffffff80002b3b30
> frame pointer              = 0x28 :0xffffff80002b3b50
> code segment               = base 0x0, limit 0xfffff, type 0x1b
>                            = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags           = interrupt enabled, resume, IOPL = 0
> current process            = 13 (g_event)
> trap number                = 12
> panic: page fault
> cpuid = 5
> KDB: stack backtrace:
> #0 0xffffffff808680fe at kdb_backtrace+0x5e
> #1 0xffffffff8x832cb7 at panic+0x187
> #2 0xffffffff80b185a0 at trap_fatal+0x290
> #3 0xffffffff80b188e9 at trap_pfault+0x1f9
> #4 0xffffffff80b18daf at trap+0x3df
> #5 0xffffffff80b0324f at calltrap+0x8
> #6 0xffffffff807d165c at g_destroy_consumer+0x4c
> #7 0xffffffff807ce6cc at g_run_events+0x1ec
> #8 0xffffffff8080682f at fork_exit+0x11f
> #9 0xffffffff80b0377e at fork_trampoline+0xe
> 
> #############################################################
> 
> - I'm using a GENERIC kernel.
> - Following the instructions here: 
http://www.freebsd.org/doc/faq/advanced.html
>   I'm able to ascertain that the problem exists in one of the following two 
functions:
> 
> db1# nm -n /boot/kernel/kernel | fgrep ffffffff808650
> ffffffff80865080 T bioq_init
> ffffffff808650b0 T bioq_remove

No, I think it occurred in some other routine.  Note that 5023 < 5080, so the 
PC is before the start of 'bioq_init()'.  It's probably in some static 
function called by g_destroy_consumer() such as g_do_wither().  Do you have
a kernel.symbols file?  If so, doing 'gdb /boot/kernel/kernel' followed by
'l *0xffffffff80865023' would be very helpful.

-- 
John Baldwin
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