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Commit 7943e15a authored by Li Zefan's avatar Li Zefan Committed by Ingo Molnar
Browse files

sched/cpuacct: Allocate per_cpu cpuusage for root cpuacct statically 



This is a preparation, so later we can initialize cpuacct
earlier.

Signed-off-by: default avatarLi Zefan <lizefan@huawei.com>
Cc: Tejun Heo <tj@kernel.org>
Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51553822.5000403@huawei.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent d1712796

kernel/sched/cpuacct.c

+2 −2
Original line number Diff line number Diff line
@@ -58,6 +58,7 @@ static inline struct cpuacct *parent_ca(struct cpuacct *ca) 
	return cgroup_ca(ca->css.cgroup->parent);

}



static DEFINE_PER_CPU(u64, root_cpuacct_cpuusage);

static struct cpuacct root_cpuacct;



/* create a new cpu accounting group */
@@ -290,8 +291,7 @@ void cpuacct_account_field(struct task_struct *p, int index, u64 val) 
void __init cpuacct_init(void)

{

	root_cpuacct.cpustat = &kernel_cpustat;

	root_cpuacct.cpuusage = alloc_percpu(u64);

	BUG_ON(!root_cpuacct.cpuusage); /* Too early, not expected to fail */

	root_cpuacct.cpuusage = &root_cpuacct_cpuusage;

}



struct cgroup_subsys cpuacct_subsys = {