kern/68546: System seems to hang

[Peter Holm]

>Number:         68546
>Category:       kern
>Synopsis:       System seems to hang
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jul 01 09:10:24 GMT 2004
>Closed-Date:
>Last-Modified:
>Originator:     Peter Holm
>Release:        FreeBSD 5.2-CURRENT i386
>Organization:
>Environment:
System: FreeBSD current.osted.lan 5.2-CURRENT FreeBSD 5.2-CURRENT #0: Wed Jun 30 18:57:12 CEST 2004 pho at peter.osted.lan:/usr/src/sys/i386/compile/PHO i386


	
>Description:
	System seems to hang after lots of
	ad0: WARNING - READ_DMA interrupt was seen but timeout fired LBA=xxx
	ad0: WARNING - WRITE_DMA interrupt was seen but timeout fired LBA=xxx
	Seen a few times during stress test.
	For details see http://www.holm.cc/stress/log/cons56.html
	
>How-To-Repeat:
	
>Fix:

	


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