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

[Jeff Squyres (jsquyres)]

Thank you!

George reviewed your patch and adjusted it a bit.  We applied it to master and it's pending to the release series (v1.8.x).

Would you mind testing a nightly master snapshot?  It should be in tonight's build:

    http://www.open-mpi.org/nightly/master/



> On Apr 30, 2015, at 12:50 AM, 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>


-- 
Jeff Squyres
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