gather-topology: some comments

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

utils/hwloc/hwloc-gather-topology.in

@@ -219,14 +219,22 @@ savefile "$destdir/$basename" /proc/self/cpuset
 savefile "$destdir/$basename" /proc/self/cgroup
 savefile "$destdir/$basename" /proc/driver/nvidia
 
-# Gather the following list of directories
+# Gather cpu and node information
+# (no need for savebusdir since we already gather the target /sys/devices/system/{cpu,node} explicitly)
 savedir "$destdir/$basename" /sys/devices/system/cpu/
-savedir "$destdir/$basename" /sys/devices/system/node/
 savedir "$destdir/$basename" /sys/bus/cpu/devices/
+savedir "$destdir/$basename" /sys/devices/system/node/
 savedir "$destdir/$basename" /sys/bus/node/devices/
+
+# Gather DMI IDs
+# (no need for aveclassdir since we only want "id" and it usually points to /sys/devices/virtual/dmi/id/)
 savedir "$destdir/$basename" /sys/class/dmi/id/
-savedir "$destdir/$basename" /sys/devices/virtual/dmi/id/ # we currently scan this one and the above
+savedir "$destdir/$basename" /sys/devices/virtual/dmi/id/
+
+# Gather hugepage information
 savedir "$destdir/$basename" /sys/kernel/mm/hugepages/
+
+# Gather POWER device-tree
 savedir "$destdir/$basename" /proc/device-tree/cpus/
 
 # Gather the default /var/run/hwloc (in case it was created by a system-wide hwloc-dump-hwdata)