amd64/154331: HP DL360 G6 server hang when ssh transmit large amounts of data

[Dmitry Dolzenko]

>Number:         154331
>Category:       amd64
>Synopsis:       HP DL360 G6 server hang when ssh transmit large  amounts of data
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jan 27 09:30:09 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Dmitry Dolzenko
>Release:        8.1-RELEASE-p2
>Organization:
NG
>Environment:
FreeBSD srfilm.sernxx.ru 8.1-RELEASE-p2 FreeBSD 8.1-RELEASE-p2 #3: Wed Jan 26 14:25:18 MSK 2011     root at srfilm.sernxx.ru:/usr/obj/usr/src/sys/KERN  amd64
>Description:
Hewlett Packard DL360 G6 server hand without panic or exeption errors on the screen.
I connect to problematic server via ssh from freebsd or windows computer. 
When I run  "find /usr/ports" DL360 server hang after 3-4 seconds completely without errors and exeption messages. I can't switch consoles via alt+f1 alt+f2. Only caps lock LED work when I press caps lock key.

When I start "find /usr/ports" from local console all work fine. Problem appear after upgrade 8.0 to 8.1p2
Previously 8.0-RELEASE work fine without problems about 9 month on this server.

DL360 G6 have 2 bce LAN cards and ciss RAID.

Server configuration:
DL360G6 1x QC E5504 (2.0 GHz, 4 MB L3 Cache, 80Watt DDR3-800) 4 (2x2)GB Memory, P410i Z , 2 x 500GB 

>How-To-Repeat:
1. connect remotely via ssh
2. run "find /usr/ports"
server hang after 3-4 seconds 
>Fix:


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