[Mpi3-rma] nested locks

[Jim Dinan]

Jeff,

With apologies if I have misunderstood your question.  To clarify, the
example Rajeev gave was forbidden in MPI-2.  One could not have concurrent
passive target access epochs, even if they accessed different targets.  It
is allowed in MPI-3.

 ~Jim.


On Mon, Aug 19, 2013 at 3:52 PM, Jeff Hammond <jeff.science at gmail.com>wrote:

> you mean lock at those ranks, not by those ranks?  those aren't
> conflicting so i don't see the issue.  maybe i am a dolt though.
>
> jeff
>
>
> On Mon, Aug 19, 2013 at 2:44 PM, Rajeev Thakur <thakur at mcs.anl.gov> wrote:
>
>> Did we make any change in MPI 3.0 to allow nesting of MPI_Win_lock calls?
>> For example,
>>
>> Win_lock(rank 1)
>>     Win_lock(rank 2)
>>
>>     Win_unlock(rank 2)
>> Win_unlock(rank 1)
>>
>> I can't find the text we added or deleted to allow this.
>>
>> But I do see text that disallows this:
>> pg 437, ln 28: "Distinct access epochs for win at the same process must
>> be disjoint."
>>
>> Rajeev
>>
>>
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>>
>
>
>
> --
> Jeff Hammond
> jeff.science at gmail.com
>
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