Commit-ID: b91473ff6e979c0028f02f90e40c844959c736d8 Gitweb: http://git.kernel.org/tip/b91473ff6e979c0028f02f90e40c844959c736d8 Author: Peter Zijlstra <pet...@infradead.org> AuthorDate: Thu, 23 Mar 2017 15:56:12 +0100 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Tue, 4 Apr 2017 11:44:06 +0200
sched,tracing: Update trace_sched_pi_setprio() Pass the PI donor task, instead of a numerical priority. Numerical priorities are not sufficient to describe state ever since SCHED_DEADLINE. Annotate all sched tracepoints that are currently broken; fixing them will bork userspace. *hate*. Signed-off-by: Peter Zijlstra (Intel) <pet...@infradead.org> Reviewed-by: Steven Rostedt <rost...@goodmis.org> Cc: juri.le...@arm.com Cc: bige...@linutronix.de Cc: xlp...@redhat.com Cc: mathieu.desnoy...@efficios.com Cc: jdesfos...@efficios.com Cc: bris...@redhat.com Link: http://lkml.kernel.org/r/20170323150216.353599...@infradead.org Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- include/trace/events/sched.h | 16 +++++++++------- kernel/sched/core.c | 2 +- 2 files changed, 10 insertions(+), 8 deletions(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 9e3ef6c..ae1409f 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -70,7 +70,7 @@ DECLARE_EVENT_CLASS(sched_wakeup_template, TP_fast_assign( memcpy(__entry->comm, p->comm, TASK_COMM_LEN); __entry->pid = p->pid; - __entry->prio = p->prio; + __entry->prio = p->prio; /* XXX SCHED_DEADLINE */ __entry->success = 1; /* rudiment, kill when possible */ __entry->target_cpu = task_cpu(p); ), @@ -147,6 +147,7 @@ TRACE_EVENT(sched_switch, memcpy(__entry->prev_comm, prev->comm, TASK_COMM_LEN); __entry->next_pid = next->pid; __entry->next_prio = next->prio; + /* XXX SCHED_DEADLINE */ ), TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==> next_comm=%s next_pid=%d next_prio=%d", @@ -181,7 +182,7 @@ TRACE_EVENT(sched_migrate_task, TP_fast_assign( memcpy(__entry->comm, p->comm, TASK_COMM_LEN); __entry->pid = p->pid; - __entry->prio = p->prio; + __entry->prio = p->prio; /* XXX SCHED_DEADLINE */ __entry->orig_cpu = task_cpu(p); __entry->dest_cpu = dest_cpu; ), @@ -206,7 +207,7 @@ DECLARE_EVENT_CLASS(sched_process_template, TP_fast_assign( memcpy(__entry->comm, p->comm, TASK_COMM_LEN); __entry->pid = p->pid; - __entry->prio = p->prio; + __entry->prio = p->prio; /* XXX SCHED_DEADLINE */ ), TP_printk("comm=%s pid=%d prio=%d", @@ -253,7 +254,7 @@ TRACE_EVENT(sched_process_wait, TP_fast_assign( memcpy(__entry->comm, current->comm, TASK_COMM_LEN); __entry->pid = pid_nr(pid); - __entry->prio = current->prio; + __entry->prio = current->prio; /* XXX SCHED_DEADLINE */ ), TP_printk("comm=%s pid=%d prio=%d", @@ -413,9 +414,9 @@ DEFINE_EVENT(sched_stat_runtime, sched_stat_runtime, */ TRACE_EVENT(sched_pi_setprio, - TP_PROTO(struct task_struct *tsk, int newprio), + TP_PROTO(struct task_struct *tsk, struct task_struct *pi_task), - TP_ARGS(tsk, newprio), + TP_ARGS(tsk, pi_task), TP_STRUCT__entry( __array( char, comm, TASK_COMM_LEN ) @@ -428,7 +429,8 @@ TRACE_EVENT(sched_pi_setprio, memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); __entry->pid = tsk->pid; __entry->oldprio = tsk->prio; - __entry->newprio = newprio; + __entry->newprio = pi_task ? pi_task->prio : tsk->prio; + /* XXX SCHED_DEADLINE bits missing */ ), TP_printk("comm=%s pid=%d oldprio=%d newprio=%d", diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 37b152a..0c443bb 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3752,7 +3752,7 @@ void rt_mutex_setprio(struct task_struct *p, struct task_struct *pi_task) goto out_unlock; } - trace_sched_pi_setprio(p, prio); /* broken */ + trace_sched_pi_setprio(p, pi_task); oldprio = p->prio; if (oldprio == prio)
