openmpi

Aurelien Bouteiller ccc8aa5784 Fix a segfault caused by making copies of the pointer to an array that is realloced meanwhile. The base pointer can change its address while the copy still tries to access pages that are not ours anymore.

As a safeguard, good coding style should never access directly opal_pointer_array_t->addr or opal_value_array_t->bytes_array. I found another instance of the same bug somewhere else and will commit a separate patch for it. 

This commit fixes ticket #1858 and solves user case http://www.open-mpi.org/community/lists/devel/2009/03/5731.php .

Aurelien

This commit was SVN r20903.

2009-03-31 15:41:55 +00:00

base.h

Modify the base collective algorithms to take an array of arbitrary vpids instead of assuming everything is ordered in a particular way. Modify the hier grpcomm module to support arbitrary mappings

2009-02-19 21:35:20 +00:00

grpcomm_base_allgather.c

- Finally add the missing opal/util/output.h

2009-03-17 22:37:15 +00:00

grpcomm_base_close.c

Fix the allgather and allgather_list functions to avoid deadlocks at large node/proc counts. Violated the RML rules here - we received the allgather buffer and then did an xcast, which causes a send to go out, and is then subsequently received by the sender. This fix breaks that pattern by forcing the recv to complete outside of the function itself - thus, the allgather and allgather_list always complete their recvs before returning or sending.

2008-03-24 20:50:31 +00:00

grpcomm_base_coll.c

- Finally add the missing opal/util/output.h