kern/83319: Systencrash on Heavy HardDisk Load.

[Gerhard Schmidt]

>Number:         83319
>Category:       kern
>Synopsis:       Systencrash on Heavy HardDisk Load.
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 12 11:00:34 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Gerhard Schmidt
>Release:        FreeBSD 5.4-STABLE i386
>Organization:
Technische Universität münchen
>Environment:
System: FreeBSD etustar.ze.tum.de 5.4-STABLE FreeBSD 5.4-STABLE #0: Tue Jul 12 11:29:24 CEST 2005 root at etustar.ze.tum.de:/usr/src/sys/i386/compile/ETUSTAR i386

>Description:
	When my system is und heavy io load the system crashes with
Fatal trap 1: privileged instruction fault while in kernel mode
instruction pointer     = 0x8:0xc056f18d
stack pointer           = 0x10:0xe8e9baec
frame pointer           = 0x10:0xe8e9baf8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 694 (bonnie++)
trap number             = 1
panic: privileged instruction fault

I have a core file but without debugging information. I Try to 
provide a kernel and core file with debugging enabled.  

>How-To-Repeat:
	Do some heavy IO (like mastering a Video DVD) 
>Fix:
	n/k
>Release-Note:
>Audit-Trail:
>Unformatted: