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Re: cache_lock: blocked & unblocked


From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 20 Jul 2011 21:08:25 -0700 (PDT)

:Hi,
:
:I got these on my DragonFly v2.11.0.247.gda17d9-DEVELOPMENT
:
:[diagnostic] cache_lock: blocked on 0xdacafa28 "2.0"
:[diagnostic] cache_lock: unblocked 2.0 after 9 secs
:[diagnostic] cache_lock: blocked on 0xdc244c18 "2.0"
:[diagnostic] cache_lock: unblocked 2.0 after 2 secs
:[diagnostic] cache_lock: blocked on 0xd9968ea8 "mail"
:[diagnostic] cache_lock: unblocked mail after 15 secs
:[diagnostic] cache_lock: blocked on 0xc46a7378 ""
:[diagnostic] cache_lock: blocked on 0xc46a7378 ""
:[diagnostic] cache_lock: unblocked  after 0 secs
:[diagnostic] cache_lock: unblocked  after 0 secs
:
:is there any thing I should chek out?
:
:Thanks
:
:--Siju

    No, as long as the blockages unblock at some point it's ok.  The
    blockages are likely due to hammer's flusher.  I have a patch under
    test (related to the blogbench thread) that also seems to reduce
    the namecache stalls.

					-Matt
					Matthew Dillon 
					<dillon@backplane.com>



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