Re: [nfs] process locks in "bo_wwait" on 6.4

2009/6/29 Attilio Rao <attilio@xxxxxxxxxxx>:
2009/6/29 pluknet <pluknet@xxxxxxxxx>:
2009/6/29 Attilio Rao <attilio@xxxxxxxxxxx>:
2009/6/29 pluknet <pluknet@xxxxxxxxx>:
2009/6/26 pluknet <pluknet@xxxxxxxxx>:
2009/6/26 pluknet <pluknet@xxxxxxxxx>:
Hello.

While building a module on nfs mounted /usr/src
I got an unkillable process waiting forever in bo_wwait.

Small note: iface on NFS server has mtu changed from 1500 to 1450.
Can this be a source of the problem?

This is 100% reproducible. Lock in the same place. Any hints?

Can you also show the value of ps?
A precise map of what processes are doing would give an help.
Also would be useful to printout traces for other threads and not only
the stucked one.


From another run:

I'm unable to see who would be locking the buffer object in question.
Do you have INVARIANT_SUPPORT/INVARIANTS on?

Yes, I do both.

What revision of /usr/src/sys/kern/vfs_bio.c are you running with?


As of 6.4-R: CVS rev 1.491.2.12.4.1 / SVN rev 183531.

--
wbr,
pluknet
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