pids_try_charge

Name:pids_try_charge - hierarchically try to charge the pid count*@pids: the pid cgroup state*@num: the number of pids to charge* This function follows the set limit. It will fail if the charge would cause* the new value to exceed the hierarchical limit

Proto:static int pids_try_charge(struct pids_cgroup *pids, int num)

Type:int

Parameter:

Type	Parameter	Name
struct pids_cgroup *	pids
int	num

147

When parent_pids(p) cycle

148

new = atomic64_add_return(num, & * Use 64-bit types so that we can safely represent "max" as * %PIDS_MAX = (%PID_MAX_LIMIT + 1).)

149

limit = atomic64_read( & limit)

156

If new > limit Then Go to revert

160

Return 0

162

163

When q != p cycle pids_cancel - uncharge the local pid count*@pids: the pid cgroup state*@num: the number of pids to cancel* This function will WARN if the pid count goes under 0, because such a case is* a bug in the pids controller proper.

165

pids_cancel - uncharge the local pid count*@pids: the pid cgroup state*@num: the number of pids to cancel* This function will WARN if the pid count goes under 0, because such a case is* a bug in the pids controller proper.

167

Return -EAGAIN

**Caller**
Name	Describe
pids_can_fork	ask_css_check(true) in pids_can_fork() and pids_cancel_fork() relies* on cgroup_threadgroup_change_begin() held by the copy_process().

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion