PT-2340 - Support MySQL 8.4

- Moved data collection for THP from lib/bash/report_system_info.sh to lib/bash/collect_system_info.sh, so pt-summary reports THP status on the machine where samples were collected, not on the machine where an engineer examines samples.

bin/pt-summary

@@ -906,6 +906,8 @@ collect_system_data () { local PTFUNCNAME=collect_system_data;
 
    fio_status_minus_a "$data_dir/fusion-io_card"
 
+   cat /sys/kernel/mm/transparent_hugepage/enabled >"$data_dir/transparent_hugepage" 2>/dev/null
+
    for file in $data_dir/*; do
       [ "$file" = "vmstat" ] && continue
       [ ! -s "$file" ] && rm "$file"
@@ -2338,23 +2340,21 @@ report_system_summary () { local PTFUNCNAME=report_system_summary;
                                        "$platform"
 
    section "Memory management"
-   report_transparent_huge_pages
+   report_transparent_huge_pages "$data_dir/transparent_hugepage"
 
    section "The End"
 }
 
 report_transparent_huge_pages () {
+   local file="$1"
 
-  if [ -f /sys/kernel/mm/transparent_hugepage/enabled ]; then
-    CONTENT_TRANSHP=$(</sys/kernel/mm/transparent_hugepage/enabled)
-    STATUS_THP_SYSTEM=$(echo $CONTENT_TRANSHP | grep -cv '\[never\]')
-  fi
-  if [ $STATUS_THP_SYSTEM = 0 ]; then
-    echo "Transparent huge pages are currently disabled on the system."
-  else
-    echo "Transparent huge pages are enabled."
-  fi
+   [ -e "$file" ] || return
 
+   if [ $(grep -cv '\[never\]' $file) = 0 ]; then
+      echo "Transparent huge pages are currently disabled on the system."
+   else
+      echo "Transparent huge pages are enabled."
+   fi
 }
 
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