Re: 2.2.1 SMP: NFS can't get a request slot
Steve Hsieh (steveh@eecs.umich.edu)
Wed, 24 Feb 1999 03:23:37 -0500 (EST)
> > Feb 4 08:51:49 sk kernel: nfs: task 31660 can't get a request slot
> >
> > After seeing these messages, nfs on this SMP 2.2.1 machine no longer
> > works. The problem only seems to crop up if the machine accesses its own
> > nfs server (ie: export a directory and then access the directory via amd's
> > automounter on the same machine).
> >
>
> The messages themselves just mean that the RPC layer is congested, and
> that a backlog of messages waiting to be sent is building up. Whenever
> one of these messages times out, it issues the 'task xxx can't get a
> request slot' error.
>
> The question then arises as to why the RPC layer gets congested when
> accessing your own nfs server. I have no problems with this on my own
> machine, so I would first and foremost suspect amd. Can you repeat the
> problem using just the stock NFS client + server?
The problem only occurs on our quad SMP when all processors are running
disk-intensive simulations. I will try to bypass amd and see what
happens... The problem is sporadic and therefore hard to repeat.
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