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cgroup: retry file writes on EINTR errors

This commit is contained in:
Andrew Dunham 2020-06-29 09:09:53 -07:00
parent e8f1a5c1f6
commit 079123b363
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GPG Key ID: 72F1EB2952FE1D5A
1 changed files with 21 additions and 3 deletions
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24
runsc/cgroup/cgroup.go
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@ -92,7 +92,17 @@ func setOptionalValueUint16(path, name string, val *uint16) error {
func setValue(path, name, data string) error {
fullpath := filepath.Join(path, name)
return ioutil.WriteFile(fullpath, []byte(data), 0700)
// Retry writes on EINTR; see:
// https://github.com/golang/go/issues/38033
for {
err := ioutil.WriteFile(fullpath, []byte(data), 0700)
if err == nil {
return nil
} else if !errors.Is(err, syscall.EINTR) {
return err
}
}
}
func getValue(path, name string) (string, error) {
@ -132,8 +142,16 @@ func fillFromAncestor(path string) (string, error) {
if err != nil {
return "", err
}
if err := ioutil.WriteFile(path, []byte(val), 0700); err != nil {
return "", err
// Retry writes on EINTR; see:
// https://github.com/golang/go/issues/38033
for {
err := ioutil.WriteFile(path, []byte(val), 0700)
if err == nil {
break
} else if !errors.Is(err, syscall.EINTR) {
return "", err
}
}
return val, nil
}