From e6c390f2dfd04c165ce45b0032f73fba85b1f282 Mon Sep 17 00:00:00 2001 From: Dario Faggioli Date: Thu, 7 Nov 2013 14:43:35 +0100 Subject: [PATCH] sched: Add sched_class->task_dead() method 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 will be useful for the scheduling classes that want to be notified when one of their tasks dies, e.g. to perform some cleanup actions, such as SCHED_DEADLINE. Signed-off-by: Dario Faggioli Reviewed-by: Paul Turner Signed-off-by: Juri Lelli Cc: bruce.ashfield@windriver.com Cc: claudio@evidence.eu.com Cc: darren@dvhart.com Cc: dhaval.giani@gmail.com Cc: fchecconi@gmail.com Cc: fweisbec@gmail.com Cc: harald.gustafsson@ericsson.com Cc: hgu1972@gmail.com Cc: insop.song@gmail.com Cc: jkacur@redhat.com Cc: johan.eker@ericsson.com Cc: liming.wang@windriver.com Cc: luca.abeni@unitn.it Cc: michael@amarulasolutions.com Cc: nicola.manica@disi.unitn.it Cc: oleg@redhat.com Cc: paulmck@linux.vnet.ibm.com Cc: p.faure@akatech.ch Cc: rostedt@goodmis.org Cc: tommaso.cucinotta@sssup.it Cc: vincent.guittot@linaro.org Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1383831828-15501-2-git-send-email-juri.lelli@gmail.com Signed-off-by: Ingo Molnar --- 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 19db8f3b0e3b..25b377986547 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2003,6 +2003,9 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev) if (unlikely(prev_state == TASK_DEAD)) { task_numa_free(prev); + 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 88c85b21d633..b3b4a4953efc 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1023,6 +1023,7 @@ 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);