[mpich-commits] [mpich] MPICH primary repository branch, master, updated. v3.0.2-6-g2bdb181

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http://git.mpich.org/mpich.git/commitdiff/2bdb181f2ff8607c3cfa6f7d306e94f604dc94ba

commit 2bdb181f2ff8607c3cfa6f7d306e94f604dc94ba
Author: Dave Goodell <goodell at mcs.anl.gov>
Date:   Tue Feb 5 10:53:55 2013 -0600

    explain external32 limitations in RELEASE_NOTES
    
    references ticket #1754.
    
    No reviewer.

diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index 4d44831..49f2e7e 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -36,7 +36,14 @@
 
  * Support for "external32" data representation is incomplete. This
    affects the MPI_Pack_external and MPI_Unpack_external routines, as
-   well the external data representation capabilities of ROMIO.
+   well the external data representation capabilities of ROMIO.  In
+   particular: noncontiguous user buffers could consume egregious
+   amounts of memory in the MPI library and any types which vary in
+   width between the native representation and the external32
+   representation will likely cause corruption.  The following ticket
+   contains some additional information:
+
+     http://trac.mpich.org/projects/mpich/ticket/1754
 
  * ch3 has known problems in some cases when threading and dynamic
    processes are used together on communicators of size greater than

-----------------------------------------------------------------------

Summary of changes:
 RELEASE_NOTES |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)


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