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openmpi/oshmem/mca/sshmem/mmap/help-oshmem-sshmem-mmap.txt
Ralph Castain 1e2019ce2a Revert "Update to sync with OMPI master and cleanup to build"
This reverts commit cb55c88a8b7817d5891ff06a447ea190b0e77479.
2016-11-22 15:03:20 -08:00

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# -*- text -*-
#
# Copyright (c) 2014 Mellanox Technologies, Inc.
# All rights reserved.
# $COPYRIGHT$
#
# Additional copyrights may follow
#
# $HEADER$
#
#
[mmap:create segment failure]
You can try the following:
1. Decrease the symmetric heap area with
"-x SHMEM_SYMMETRIC_HEAP_SIZE=<value>".
2. Set "--mca sshmem_base_start_address 0" for
automatic selection by OS of virtual start address for sshmem.
This issue could also be related to CONFIG_STRICT_DEVMEM
kernel option which if enabled prevents access to physical
memory via "mmap". In this case you could try using other
sshmem components instead.
#