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    SubjectRe: [PATCH] perf_event: fix slow and broken cgroup context switch code
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    On Thu, 2011-08-25 at 15:58 +0200, Stephane Eranian wrote:
    > +static inline void perf_event_task_sched_in(struct task_struct *prev,
    > + struct task_struct *task)
    > {
    > if (static_branch(&perf_sched_events))
    > + __perf_event_task_sched_in(prev, task);
    > }
    >
    > +static inline void perf_event_task_sched_out(struct task_struct *prev,
    > + struct task_struct *next)
    > {
    > perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0);
    >
    > + if (static_branch(&perf_sched_events))
    > + __perf_event_task_sched_out(prev, next);
    > }

    BTW, Ingo, is there any particular reason we have these two calls and
    not a single perf_event_task_switch() call?


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