[Beowulf] [rpciod] in D state
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Henning Fehrmann henning.fehrmann at aei.mpg.deMon Jul 28 07:57:09 PDT 2008
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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 No chance. > > 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: http://bugzilla.kernel.org/show_bug.cgi?id=10837 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. Cheers Henning
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