Commit-ID: efb40f588b4370ffaeffafbd50f6ff213d954254
Gitweb: https://git.kernel.org/tip/efb40f588b4370ffaeffafbd50f6ff213d954254
Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
AuthorDate: Fri, 22 Sep 2017 18:19:53 +0200
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 29 Sep 2017 10:09:10 +0200
sched/tracing: Fix trace_sched_switch task-state printing
Convert trace_sched_switch to use the common task-state helpers and
fix the "X" and "Z" order, possibly they ended up in the wrong order
because TASK_REPORT has them in the wrong order too.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
include/linux/sched.h | 2 +-
include/trace/events/sched.h | 18 +++++++++++-------
2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 69bed53..a2fe636 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -99,7 +99,7 @@ struct task_group;
/* get_task_state(): */
#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
- __TASK_TRACED | EXIT_ZOMBIE | EXIT_DEAD)
+ __TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE)
#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h
index ae1409f..c63e20c 100644
--- a/include/trace/events/sched.h
+++ b/include/trace/events/sched.h
@@ -114,7 +114,10 @@ static inline long __trace_sched_switch_state(bool preempt, struct task_struct *
* Preemption ignores task state, therefore preempted tasks are always
* RUNNING (we will not have dequeued if state != RUNNING).
*/
- return preempt ? TASK_RUNNING | TASK_STATE_MAX : p->state;
+ if (preempt)
+ return TASK_STATE_MAX;
+
+ return __get_task_state(p);
}
#endif /* CREATE_TRACE_POINTS */
@@ -152,12 +155,13 @@ TRACE_EVENT(sched_switch,
TP_printk("prev_comm=%s prev_pid=%d prev_prio=%d prev_state=%s%s ==> next_comm=%s next_pid=%d next_prio=%d",
__entry->prev_comm, __entry->prev_pid, __entry->prev_prio,
- __entry->prev_state & (TASK_STATE_MAX-1) ?
- __print_flags(__entry->prev_state & (TASK_STATE_MAX-1), "|",
- { 1, "S"} , { 2, "D" }, { 4, "T" }, { 8, "t" },
- { 16, "Z" }, { 32, "X" }, { 64, "x" },
- { 128, "K" }, { 256, "W" }, { 512, "P" },
- { 1024, "N" }) : "R",
+
+ (__entry->prev_state & TASK_REPORT) ?
+ __print_flags(__entry->prev_state & TASK_REPORT, "|",
+ { 0x01, "S" }, { 0x02, "D" }, { 0x04, "T" },
+ { 0x08, "t" }, { 0x10, "X" }, { 0x20, "Z" }) :
+ "R",
+
__entry->prev_state & TASK_STATE_MAX ? "+" : "",
__entry->next_comm, __entry->next_pid, __entry->next_prio)
);
--
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