[mpich-discuss] MCS lock and MPI RMA problem

[Ask Jakobsen]

Interestingly, according to the paper you suggested it appears to include a
similar test in pseudo code https://htor.inf.ethz.ch/publi
cations/img/hpclocks.pdf (see Listing 3 in paper).

Unfortunately, removing the test in the release protocol did not solve the
problem. The race condition is much more difficult to provoke, but I
managed when setting the size of the communicator to 3 (only tested even
sizes so far).