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    SubjectRe: [PATCH 01/14] sched: add sched_class->task_dead.
    On Thu,  7 Nov 2013 14:43:35 +0100
    Juri Lelli <juri.lelli@gmail.com> wrote:

    > From: Dario Faggioli <raistlin@linux.it>
    >
    > Add a new function to the scheduling class interface. It is called
    > at the end of a context switch, if the prev task is in TASK_DEAD state.
    >
    > It might be useful for the scheduling classes that want to be notified
    > when one of their task dies, e.g. to perform some cleanup actions.

    Nit. s/task/tasks/

    -- Steve

    >
    > Signed-off-by: Dario Faggioli <raistlin@linux.it>
    > Signed-off-by: Juri Lelli <juri.lelli@gmail.com>
    > ---
    > kernel/sched/core.c | 3 +++
    > kernel/sched/sched.h | 1 +
    > 2 files changed, 4 insertions(+)
    >
    > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
    > index 5ac63c9..850a02c 100644
    > --- a/kernel/sched/core.c
    > +++ b/kernel/sched/core.c
    > @@ -1890,6 +1890,9 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
    > if (mm)
    > mmdrop(mm);
    > if (unlikely(prev_state == TASK_DEAD)) {
    > + if (prev->sched_class->task_dead)
    > + prev->sched_class->task_dead(prev);
    > +
    > /*
    > * Remove function-return probe instances associated with this
    > * task and put them back on the free list.
    > diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
    > index b3c5653..64eda5c 100644
    > --- a/kernel/sched/sched.h
    > +++ b/kernel/sched/sched.h
    > @@ -992,6 +992,7 @@ struct sched_class {
    > void (*set_curr_task) (struct rq *rq);
    > void (*task_tick) (struct rq *rq, struct task_struct *p, int queued);
    > void (*task_fork) (struct task_struct *p);
    > + void (*task_dead) (struct task_struct *p);
    >
    > void (*switched_from) (struct rq *this_rq, struct task_struct *task);
    > void (*switched_to) (struct rq *this_rq, struct task_struct *task);



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