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package fs2
import (
"errors"
"os"
"strconv"
"github.com/opencontainers/cgroups"
"github.com/opencontainers/cgroups/fscommon"
)
func isHugeTlbSet(r *cgroups.Resources) bool {
return len(r.HugetlbLimit) > 0
}
func setHugeTlb(dirPath string, r *cgroups.Resources) error {
if !isHugeTlbSet(r) {
return nil
}
const suffix = ".max"
skipRsvd := false
for _, hugetlb := range r.HugetlbLimit {
prefix := "hugetlb." + hugetlb.Pagesize
val := strconv.FormatUint(hugetlb.Limit, 10)
if err := cgroups.WriteFile(dirPath, prefix+suffix, val); err != nil {
return err
}
if skipRsvd {
continue
}
if err := cgroups.WriteFile(dirPath, prefix+".rsvd"+suffix, val); err != nil {
if errors.Is(err, os.ErrNotExist) {
skipRsvd = true
continue
}
return err
}
}
return nil
}
func statHugeTlb(dirPath string, stats *cgroups.Stats) error {
hugetlbStats := cgroups.HugetlbStats{}
rsvd := ".rsvd"
for _, pagesize := range cgroups.HugePageSizes() {
prefix := "hugetlb." + pagesize
again:
value, err := fscommon.GetCgroupParamUint(dirPath, prefix+rsvd+".current")
if err != nil {
if rsvd != "" && errors.Is(err, os.ErrNotExist) {
rsvd = ""
goto again
}
return err
}
hugetlbStats.Usage = value
value, err = fscommon.GetValueByKey(dirPath, prefix+".events", "max")
if err != nil {
return err
}
hugetlbStats.Failcnt = value
stats.HugetlbStats[pagesize] = hugetlbStats
}
return nil
}
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