kern/135408: [aac] Adaptec 5405 RAID controller hanging under high load +suggested fix

[yuri.gorchakov at point-group.ru]

The following reply was made to PR kern/135408; it has been noted by GNATS.

From: yuri.gorchakov at point-group.ru
To: bug-followup at FreeBSD.org
Cc: "Michael" <freebsdusb at bindone.de>
Subject: kern/135408: [aac] Adaptec 5405 RAID controller hanging under high 
     load +suggested fix
Date: Mon, 29 Jun 2009 13:18:14 +0700 (NOVST)

 Dear all,
 
 I've tested new firmware from Adaptec
 (http://www.adaptec.com/en-US/speed/raid/asr/fw_bios/5405_fw_b17380_exe.htm) and was able to
 heavily load the I/O subsystems on the server for 2-3 hours with blogbench at various loads
 and make -j16 buildworld, everything worked smoothly, but at some point the controller locked
 up same way as before.
 The firmware didn't fix the issue, may be prolonged the lock up for little bit.
 
 Yuri.