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    SubjectRe: [PATCH v3] cpuacct: VIRT_CPU_ACCOUNTING don't prevent percpu cputime count
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    On Sat, 2009-05-09 at 18:26 +0900, KOSAKI Motohiro wrote:
    >
    > Index: b/kernel/sched.c
    > ===================================================================
    > --- a/kernel/sched.c 2009-05-09 16:48:08.000000000 +0900
    > +++ b/kernel/sched.c 2009-05-09 18:16:00.000000000 +0900
    > @@ -824,8 +824,12 @@ static struct file_operations sched_feat
    > .release = single_release,
    > };
    >
    > +static __read_mostly s32 cpuacct_batch;
    > +
    > static __init int sched_init_debug(void)
    > {
    > + cpuacct_batch = jiffies_to_cputime(percpu_counter_batch);
    > +
    > debugfs_create_file("sched_features", 0644, NULL, NULL,
    > &sched_feat_fops);

    I'm pretty user you can select cpu accounting without SCHED_DEBUG...

    > @@ -10457,7 +10461,8 @@ static void cpuacct_update_stats(struct
    > ca = task_ca(tsk);
    >
    > do {
    > - percpu_counter_add(&ca->cpustat[idx], val);
    > + __percpu_counter_add(&ca->cpustat[idx], val, cpuacct_batch);
    > +
    > ca = ca->parent;
    > } while (ca);
    > rcu_read_unlock();
    >



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