i386/127343: System locks -- simular to PR 123729

[Philip Drapeau]

>Number:         127343
>Category:       i386
>Synopsis:       System locks -- simular to PR 123729
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Sep 13 07:20:03 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Philip Drapeau
>Release:        7.0
>Organization:
SkySurfer
>Environment:
FreeBSD pen-rdd-01.skysurfer.ca 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Mon Aug 11 15:36:34 PDT 2008     root at pen-mweb-01.skysurfer.ca:/usr/obj/usr/src/sys/RDD  i386

>Description:
It seems that I'm experiencing lockups on the system that exactly resemble PR123729 which was closed. Initially I could cause the locks to happen just simply by causing traffic on a device using the em driver (I would see abnormally high interrupts and than the system would hang). After that I switched to using polling on the device which stopped the system from crashing straight away, however eventually it does freeze. When the system hangs on about half the occasions I noticed even though it was non-responsive on the keyboard, I could get it to complain by hitting the power button and eventually something about the ACPI subsystem would come up (same message as  PR 123729). The system is a Dell PowerEdge 2650. Its using a 64bit PCI RAID controller (one of the PERC LSI Logic ones -- which is also something in common with the other PR).
>How-To-Repeat:
Just simply boot the system and let it run for a period of time ;)
>Fix:
N/A

>Release-Note:
>Audit-Trail:
>Unformatted: