freezer_attach

Name:Tasks can be migrated into a different freezer anytime regardless of its* current state. freezer_attach() is responsible for making new tasks* conform to the current state.* Freezer state changes and task migration are synchronized via*@freezer->lock

Proto:static void freezer_attach(struct cgroup_taskset *tset)

Type:void

Parameter:

Type	Parameter	Name
struct cgroup_taskset *	tset

163

mutex_lock( & freezer_mutex)

176

freezer = css_freezer(new_css)

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If Not (state & CGROUP_FREEZING) Then

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__thaw_task(task)

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Else

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ze_task - send a freeze request to given task*@p: task to send the request to* If @p is freezing, the freeze request is sent either by sending a fake* signal (if it's not a kernel thread) or waking it up (if it's a kernel* thread)

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When freezer && state & his and its descendants frozen cycle

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state &= ~his and its descendants frozen

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freezer = parent_freezer(freezer)

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mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

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