[Bug 578866] Re: NFS4 kills system (no reboot possible)

[H.-Dirk Schmitt]

I retest the issue with the current lucid 10.04.1 version on the server:

mount -t nfs4 -o rw,rsize=8192,wsize=8192   $(hostname):/share    /mnt/
dd if=/dev/zero of=/mnt/testfile

The load is constant increasing.
After some minutes the following log messages occurs:

Aug 10 21:08:21 pluto kernel: [ 3600.620029] INFO: task kswapd0:36 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.622490] INFO: task kswapd1:37 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.625284] INFO: task nfsd:4222 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.628445] INFO: task nfsd:4223 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.632244] INFO: task nfsd:4224 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.636158] INFO: task nfsd:4226 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.638376] INFO: task nfsd:4227 blocked for more than 120 seconds.
Aug 10 21:08:21 pluto kernel: [ 3600.639152] INFO: task dd:23415 blocked for more than 120 seconds.

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NFS4 kills system (no reboot possible)
https://bugs.launchpad.net/bugs/578866
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