Update KNL docs with suggestions for Dell KNLs

Bug 4793

doc/html/intel_knl.shtml

@@ -183,7 +183,10 @@ available and active feature fields and not modified by the NodeFeatures
 plugin.</p>
 
 <p>NOTE: For Dell KNL systems you must also include the<i>SystemType=Dell</i>
-option for successful operation.</p>
+option for successful operation and will likely need to increase the
+<i>SyscfgTimeout</i> to allow enough time for the command to successfully
+complete.  Experience at one site has shown that a 10 second timeout may
+be necessary, configured as <i>SyscfgTimeout=10000</i>.</p>
 
 <p>Slurm does not support the concept of multiple NUMA nodes
 within a single socket. If a KNL node is booted with multiple NUMA, then each

doc/man/man5/knl.conf.5

@@ -171,7 +171,7 @@ This parameter is used only by the "knl_generic" plugin.
 \fBSyscfgTimeout\fR
 Timeout for \fBsyscfg\fR program in milliseconds.
 Default value is 1000 milliseconds.
-For Dell KNL systems, experience has shown that a higher value of 4000
+For Dell KNL systems, experience has shown that a higher value of 10000
 milliseconds is more appropriate.
 
 .TP