Clarify KNL heterogeneous NUMA issues

The problem only exists on a subset of KNL models, those with 68 cores.
bug 2941

doc/html/intel_knl.shtml

@@ -57,7 +57,8 @@ Examples below demonstrate use of HBM.</p>
 
 <p><a name="note"><b>NOTE</b></a>: Slurm version 16.05 and earlier can only
 support homogeneous nodes (e.g. the same number of cores per NUMA node).
-KNL scn4 and quad modes are not homogeneous, but each each NUMA mode will have
+KNL processors with <u>68 cores</u> (a subset of KNL models) will not have
+homogeneous NUMA nodes in scn4 and quad modes, but each each NUMA node will have
 either 16 or 18 cores. This will result in Slurm using the lower core count,
 finding a total of 256 threads rather than 272 threads and setting the node
 to a DOWN state.</p>
@@ -240,6 +241,6 @@ NodeName=nid[00000-00127] State=UNKNOWN
 
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-<p style="text-align:center;">Last modified 6 May 2016</p>
+<p style="text-align:center;">Last modified 26 July 2016</p>
 
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