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Merge pull request #1610 from sboeuf/fix_freezer_state 

libcontainer: cgroups: Write freezer state after every state check
This commit is contained in:
Mrunal Patel 2017-10-12 07:55:10 -07:00 committed by GitHub
parent beb8716fcb acb93c9c62
commit 7c7d38bfe8
1 changed files with 9 additions and 4 deletions
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7
libcontainer/cgroups/fs/freezer.go
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@ -29,11 +29,15 @@ func (s *FreezerGroup) Apply(d *cgroupData) error {
func (s *FreezerGroup) Set(path string, cgroup *configs.Cgroup) error {
switch cgroup.Resources.Freezer {
case configs.Frozen, configs.Thawed:
for {
// In case this loop does not exit because it doesn't get the expected
// state, let's write again this state, hoping it's going to be properly
// set this time. Otherwise, this loop could run infinitely, waiting for
// a state change that would never happen.
if err := writeFile(path, "freezer.state", string(cgroup.Resources.Freezer)); err != nil {
return err
}
for {
state, err := readFile(path, "freezer.state")
if err != nil {
return err
@ -41,6 +45,7 @@ func (s *FreezerGroup) Set(path string, cgroup *configs.Cgroup) error {
if strings.TrimSpace(state) == string(cgroup.Resources.Freezer) {
break
}
time.Sleep(1 * time.Millisecond)
}
case configs.Undefined: