[Beowulf] [rpciod] in D state
henning.fehrmann at aei.mpg.de
Mon Jul 28 10:57:09 EDT 2008
On Mon, Jul 28, 2008 at 04:17:20PM +0200, Bogdan Costescu wrote:
> On Fri, 25 Jul 2008, Henning Fehrmann wrote:
> >I assume, the squared brackets mean that these are kernel processes.
> Kernel threads, yes.
> >From time to time one of them changes in to the 'D' (Uninterruptible sleep) mode. Once it happens on a particular node it is also impossible to
> >mount any nfs exports on this node, which seems logical since the nfs client uses the portmapper.
> Are you able to kill those kernel threads ? Something like:
> killall -9 rpciod
> I seem to remember that they are (re)started as needed, but my recollection of the NFS implementation on Linux is somehow hazy. Probably the best
> place to ask is the Linux NFS mailing list...
We found this:
It might appear only in the 2.6.24 kernel.
I'll try a later version. Unfortunately, this problem appears with a
small probability density. So I have to wait and to observe whether it
appears in a newer kernel.
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