Peng Tao wrote:
On Wed, Aug 3, 2011 at 10:38 AM, Jim Rees <rees@xxxxxxxxx> wrote:
> Myklebust, Trond wrote:
>
> Can you try to turn on the callback debugging ('echo 256 >
> /proc/sys/sunrpc/nfs_debug')? A wireshark trace of what is going on
> during the hang itself might also help.
>
> It doesn't fail with callback debugging turned on. I suspect the output to
> my slow serial console disrupts the timing.
>
> The trace is in
> http://www.citi.umich.edu/projects/nfsv4/pnfs/block/download/089.pcap
In frame 8785, client returned NFS4ERR_DELAY in response to
CB_SEQUENCE and the next RPC was 12s later. So it should be the case
that Trond mentioned above.
Yes, and there's some funny stuff earlier too. In frame 6381 the client
returns a delegation, then in 6387 the server tries to recall the same
delegation. Which I suppose is legal but I wonder why. This is followed by
another 12 sec delay.
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