__task_pid_nr_ns

Name:__task_pid_nr_ns

Proto:pid_t __task_pid_nr_ns(struct task_struct *task, enum pid_type type, struct pid_namespace *ns)

Type:pid_t

Parameter:

Type	Parameter	Name
struct task_struct *	task
enum pid_type	type
struct pid_namespace *	ns

470

nr = 0

472

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

473

If Not ns Then ns = task_active_pid_ns(current process)

475

If Value is more likely to compile time(pid_alive - check that a task structure is not stale*@p: Task structure to be checked.* Test if a process is not yet dead (at most zombie state)* If pid_alive fails, then pointers within the task structure* can be stale and must not be dereferenced.) Then nr = pid_nr_ns( fetch RCU-protected pointer for dereferencing( * task_pid_ptr(task, type)), ns)

477

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

479

Return nr

**Caller**
Name	Describe
perf_event_pid_type
task_pid_nr_ns
task_pid_vnr
task_pgrp_nr_ns
task_pgrp_vnr
task_session_nr_ns
task_session_vnr
task_tgid_nr_ns
task_tgid_vnr

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