hugetlb: correctly parse hugetlb.<size>.events files

Author: voidbar

cgroup2/utils.go

@@ -419,11 +419,17 @@ func readHugeTlbStats(path string) []*stats.HugeTlbStat {
 	hpSizes := hugePageSizes()
 	usage := make([]*stats.HugeTlbStat, len(hpSizes))
 	for idx, pagesize := range hpSizes {
+		events := make(map[string]uint64)
+		err := readKVStatsFile(path, "hugetlb."+pagesize+".events", events)
+		if err != nil {
+			log.L.WithError(err).Errorf("failed to read hugetlb events for %s", filepath.Join(path, "hugetlb."+pagesize+".events", events))
+		}
+
 		usage[idx] = &stats.HugeTlbStat{
 			Max:      getStatFileContentUint64(filepath.Join(path, "hugetlb."+pagesize+".max")),
 			Current:  getStatFileContentUint64(filepath.Join(path, "hugetlb."+pagesize+".current")),
 			Pagesize: pagesize,
-			Failcnt:  getStatFileContentUint64(filepath.Join(path, "hugetlb."+pagesize+".events")),
+			Failcnt:  events["max"],
 		}
 	}
 	return usage