[petsc-dev] [OMPI users] potential bug with MPI_Win_fence() in openmpi-1.8.4

[Ralph Castain]

Thanks! The patch wasn’t quite correct, but we have a good one now and it is going into 1.8.5 (just squeaked in before release)

> On Apr 29, 2015, at 9:50 PM, Satish Balay <balay at mcs.anl.gov> wrote:
> 
> OpenMPI developers,
> 
> We've had issues (memory errors) with OpenMPI - and code in PETSc
> library that uses MPI_Win_fence().
> 
> Vagrind shows memory corruption deep inside OpenMPI function stack.
> 
> I'm attaching a potential patch that appears to fix this issue for us.
> [the corresponding valgrind trace is listed in the patch header]
> 
> Perhaps there is a more appropriate fix for this memory corruption. Could
> you check on this?
> 
> [Sorry I don't have a pure MPI test code to demonstrate this error -
> but a PETSc test example code consistantly reproduces this issue]
> 
> Thanks,
> Satish<openmpi-1.8.4.patch>_______________________________________________
> users mailing list
> users at open-mpi.org
> Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users
> Link to this post: http://www.open-mpi.org/community/lists/users/2015/04/26818.php