Procedure
Modify the
/etc/modprobe.d/dvs.conf
file to add the following line:
options dvsipc_lnet lnd_name=gnix
where
gnix
is the unique LNet identifier for the Cray system.
8.12 Troubleshoot: DVS Ignores User Environment Variables
If the
nouserenv
option has not been specified in the DVS entry, and a DVS user environment variable that was
set does not override the associated DVS mount option, it appears as if DVS is ignoring user environment
variables. This can be caused by the addition of a large number of user environment variables. Due to the nature
of Linux, if a user adds a large number of user environment variables (large enough that the kernel needs to store
that information somewhere other than the usual location), DVS may not be able to find and apply those user
environment variables, producing unexpected results.
To define a large number of user environment variables, Cray recommends that users include those definitions in
the user's shell so that they are available at startup and stored where DVS can always locate them.
8.13 Clear Leftover hugetlbf Files
Prerequisites
This procedure requires root privileges
About this task
Follow the instructions in this procedure if the system displays the error message, "
LIBDMAPP ERROR during
create in _dmappi_get_sheap_addr_hugepages: Permission denied
". The node IDs shown in
these examples are for a system containing 3 sub-racks. If a system with 2 sub-racks is being used, replace these
with the node IDs for a 2 sub-rack system.
Procedure
1. Log on to the System Management Workstation (SMW) as root
2. Execute the following command to clear out any leftover
hugetlbf
files
#
pdsh -w 'nid000[00-47]' '/bin/rm -f /var/lib/hugetlbfs/global/*/*DMAPP*'
3. Verify that the leftover
hugetlbf
files have been cleared
#
pdsh -w 'nid000[00-47]' '/bin/ls -l /var/lib/hugetlbfs/global/*/*DMAPP*' 2>/dev/null|wc
0 0 0
Troubleshooting
S3016
271
