Cannot list a particular directory through NFS with UDP

[Rick Macklem]

On Sat, 2 Jan 2010, Jeremie Le Hen wrote:

>
> I will reduce the MTU and see if the problem arises with directories
> that could be read correctly otherwise.  I will keep you informed.
>

You can reduce rsize to 1024, so that it isn't happening, but that
will also change the size of the readdir reply. (ie. It might make
the problem go away, but doesn't prove that IP fragmentation is the
cause..)

> Does NFS permit to fragment/reassemble at the application layer?
>

Nope. IP fragment reassembly should work fine and IP fragmentation
happens all the time when using NFS over UDP. (Some would say NFS over
UDP misused/abused IP fragmentation. In any case, it happens more
frequently there than anywhere else.)
>> ps: I vaguely recall that the problem went away when you used TCP
>>      instead. Is that correct?
>
> Yes this is correct.
>
Thanks for poking at this, rick