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Date: Sat, 12 Aug 2006 16:06:21 GMT
From: "O. Hartmann" <ohartman@mail.uni-mainz.de>
To: freebsd-gnats-submit@FreeBSD.org
Subject: FBSD 6.1-STABLE crashes under heavy disk (ar0) I/O and acces to USB device
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>Number:         101926
>Category:       kern
>Synopsis:       [ar] 6.1-STABLE crashes under heavy disk I/O and access to USB device
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Aug 12 16:10:11 GMT 2006
>Closed-Date:    Sun Sep 25 08:13:31 UTC 2011
>Last-Modified:  Sun Sep 25 08:13:31 UTC 2011
>Originator:     O. Hartmann
>Release:        FreeBSD 6.1-STABLE/AMD64
>Organization:
>Environment:
FreeBSD XXX.XXX.XXX.org 6.1-STABLE FreeBSD 6.1-STABLE #27: Sat Aug 12 14:03:42 UTC 2006     root@XXX.XXX.XXX.org:/usr/obj/usr/src/sys/THOR  amd64

>Description:
FreeBSD 6.1-STABLE/AMD64 crashes sporadically under heavy disk I/O when
accessing USB device (simply mounting is enough to crash the box). This
behaviour has now been watched in several situations on an AMD64 based
box, when doing a lot of disk I/O due to torrent sharing or just doing a
filesystem check after a crash: box crashes without message when just
mounting an USB backup harddrive or after mounting this USB HD and doing
then a lot of disk I/O both on the USB device and the main RAID 0 (ar0)
of the box.

It is also very suspicious that doing a lot of disk I/O slows the box down
just to be unusuable, reacting very, very slow. This occured after swapping
the 'old' SATA disks to new Hitachi T7K250 SATA II HDs.
>How-To-Repeat:
Do a lot of disk I/O and then just try to mount an USB HD and do disk I/O
to this USB HD while box is still under heavy load. It may lead you into
a crash.
>Fix:

>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: jh 
State-Changed-When: Fri Sep 23 19:27:18 UTC 2011 
State-Changed-Why:  
Can you still reproduce this on recent FreeBSD versions? 

http://www.freebsd.org/cgi/query-pr.cgi?pr=101926 
State-Changed-From-To: feedback->closed 
State-Changed-By: jh 
State-Changed-When: Sun Sep 25 08:13:30 UTC 2011 
State-Changed-Why:  
Submitter can't reproduce anymore. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=101926 
>Unformatted:
