cache_lock: blocked on 0xd9903df8 "new" (again)

[elekktretterr at exemail.com.au]

this thing seems to happen every few weeks and theres a lot of it:

[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"
[diagnostic] cache_lock: blocked on 0xd9903df8 "new"

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

one of our imap accounts noticed he cant access his mailbox. then only
restart of the server itself will fix this problem.

There seeems to be a lot of imap(dovecot) processes stuck as well due to
the  blocking on 0xd9903df8.

Can anyone help investigate the mly driver for bugs?

Thanks,
Petr