From 1966aaf7d54608e8ddb7ac454b461840e763409a Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Fri, 29 Mar 2013 14:37:06 +0800 Subject: sched/cpuacct: Add cpuacct_acount_field() So we can remove open-coded cpuacct code in cputime.c. Signed-off-by: Li Zefan Acked-by: Peter Zijlstra Link: http://lkml.kernel.org/r/51553692.9060008@huawei.com Signed-off-by: Ingo Molnar --- kernel/sched/cpuacct.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'kernel/sched/cpuacct.c') diff --git a/kernel/sched/cpuacct.c b/kernel/sched/cpuacct.c index 48b5e91..72bd971 100644 --- a/kernel/sched/cpuacct.c +++ b/kernel/sched/cpuacct.c @@ -218,6 +218,29 @@ void cpuacct_charge(struct task_struct *tsk, u64 cputime) rcu_read_unlock(); } +/* + * Add user/system time to cpuacct. + * + * Note: it's the caller that updates the account of the root cgroup. + */ +void cpuacct_account_field(struct task_struct *p, int index, u64 val) +{ + struct kernel_cpustat *kcpustat; + struct cpuacct *ca; + + if (unlikely(!cpuacct_subsys.active)) + return; + + rcu_read_lock(); + ca = task_ca(p); + while (ca && (ca != &root_cpuacct)) { + kcpustat = this_cpu_ptr(ca->cpustat); + kcpustat->cpustat[index] += val; + ca = parent_ca(ca); + } + rcu_read_unlock(); +} + void __init cpuacct_init(void) { root_cpuacct.cpustat = &kernel_cpustat; -- cgit v1.1