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

[Matthew Dillon]

:
: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"
:
: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

    It does sound like your disk driver (mly I guess) is freezing.  Can
    you access anything on that partition after imap stops working?  If you
    can there might be an issue with bad blocks.  If you can't access the
    partition at all then its probably MLY locking up.

    It might be possible to reset the device with camcontrol without
    rebooting.  Its worth a shot anyhow.

					-Matt
					Matthew Dillon 
					<dillon at backplane.com>