[diagnostic] cache_lock: blocked on... extremely urgent

[Petr Janda]

Its running this raid card:;

mly0 at pci1:6:1:  class=0x010400 card=0x00541069 chip=0x00501069 rev=0x02 
hdr=0x00
   vendor   = 'Mylex Corp'
   device   = 'AcceleRAID Disk Array'
   class    = mass storage
   subclass = RAID

It seems that because of this problem, mails get stuck in postfix queues.