One of my servers does have a similar problem.
Ubuntu 10.04.2 LTS 64 bit kernel 2.6.32-31-server
The RAID controller is a Symbios Logic LSI MegaSAS 9260 (rev 03) (default drivers)
Today I found next error in dmesg " task xfssyncd: blocked for more than 120 seconds"
One of my servers does have a similar problem.
Ubuntu 10.04.2 LTS 64 bit
kernel 2.6.32-31-server
The RAID controller is a Symbios Logic LSI MegaSAS 9260 (rev 03)
(default drivers)
Today I found next error in dmesg
" task xfssyncd: blocked for more than 120 seconds"