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Gilles Gouaillardet 76204dfafe coll/basic: fix segmentation fault in neighborhood collectives if the degree
of the topology is higher than the communicator size

It is possible to have a topology degree higher than the size of the communicator.
For example, a periodic cartesian communicator on MPI_COMM_SELF. This will leave
the neighborhood collectives with a request buffer that is too small.

This commits introduces a semantic change :
from now, c_topo must be set before invoking coll_select
2014-10-10 11:56:04 +09:00
..
2014-08-21 18:56:47 +00:00
2012-04-18 15:57:29 +00:00
2014-04-21 23:30:05 +00:00
2014-10-01 14:44:09 -07:00