Bug#618744: nfsd gets stuck in D state

[Jonathan Nieder <jrnieder@gmail.com>]

Hi,

Anton Ivanov wrote:

> nfsd gets stuck in D state. Initially some machines, later all which read off
> the nfs server fail to read. Messages like:
>
> Mar 17 22:03:34 localhost kernel: [1899559.532028] statd: server rpc.statd not responding, timed out
> Mar 17 22:03:34 localhost kernel: [1899559.532055] lockd: cannot monitor greebo

Mph, that's no good.

What kernel do you use now?  Any changes?  Can you use "alt+sysrq; w"
while in that state to get backtraces for blocked tasks, in case it
helps find a deadlock?  (You may need to use "echo 1 >/proc/sys/kernel/sysrq"
before that will work; see Documentation/sysrq.txt for details.)

Hope that helps,
Jonathan