Re: pNFS read/write behavior change in 2.6.39

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On 04/26/2011 04:29 PM, Trond Myklebust wrote:
On Tue, 2011-04-26 at 16:03 +0200, Tigran Mkrtchyan wrote:
I run 2.6.39-0.rc4.git2.0 build for fedora-16 build by redhat.
Probably Steve and Bruce can comment on the patch set.

My observation is that state id provided by client on read to
DS dit not contain correct stateid:

struct stateid4 {
          uint32_t        seqid;
          opaque          other[12];
};

The seqid equals to zero when client send it to DS which is not the
value returned on OPEN.
Why do you think this is a bug? Section 8.2.2 of RFC5661 not only allows
this behaviour, it actually suggests it is appropriate for READ and
WRITE since it means that the server isn't forced to constantly check
the seqid value.
Well, It's not a bug, but it's not the behavior we was testing at Connectathon. My expectation was that during interoperability testing we catch such changes.

Tigran.
Trond

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