Messages in this thread | | | Date | Tue, 23 Oct 2007 01:08:07 -0700 | From | "Paul Menage" <> | Subject | Re: [PATCH 2/2] CFS CGroup: Report usage |
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On 10/23/07, Balbir Singh <balbir@linux.vnet.ibm.com> wrote: > > Well, without notify_on_release you can never be sure if a new task > got added to the control group or if someone acquired a reference > to it. I can't think of a safe way of removing control groups/cpusets > without using notify_on_release. >
Using notify_on_release doesn't make any guarantees that the notification, or the action based on that notification, will occur before the cgroup becomes busy again.
An rmdir() on a busy cgroup is perfectly safe, it just fails with -EBUSY. I'd just like to avoid making active control file fds trigger than failure mode.
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