sched/debug: Add explicit TASK_PARKED printing
Currently TASK_PARKED is masqueraded as TASK_INTERRUPTIBLE, give it its own print state because it will not in fact get woken by regular wakeups and is a long-term state. This requires moving TASK_PARKED into the TASK_REPORT mask, and since that latter needs to be a contiguous bitmask, we need to shuffle the bits around a bit. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -128,9 +128,10 @@ static const char * const task_state_array[] = {
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"t (tracing stop)", /* 0x08 */
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"t (tracing stop)", /* 0x08 */
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"X (dead)", /* 0x10 */
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"X (dead)", /* 0x10 */
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"Z (zombie)", /* 0x20 */
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"Z (zombie)", /* 0x20 */
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"P (parked)", /* 0x40 */
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/* states beyond TASK_REPORT: */
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/* states beyond TASK_REPORT: */
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"I (idle)", /* 0x40 */
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"I (idle)", /* 0x80 */
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};
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};
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static inline const char *get_task_state(struct task_struct *tsk)
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static inline const char *get_task_state(struct task_struct *tsk)
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@ -75,10 +75,10 @@ struct task_group;
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#define EXIT_ZOMBIE 0x0020
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#define EXIT_ZOMBIE 0x0020
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#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD)
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#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD)
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/* Used in tsk->state again: */
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/* Used in tsk->state again: */
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#define TASK_DEAD 0x0040
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#define TASK_PARKED 0x0040
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#define TASK_WAKEKILL 0x0080
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#define TASK_DEAD 0x0080
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#define TASK_WAKING 0x0100
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#define TASK_WAKEKILL 0x0100
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#define TASK_PARKED 0x0200
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#define TASK_WAKING 0x0200
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#define TASK_NOLOAD 0x0400
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#define TASK_NOLOAD 0x0400
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#define TASK_NEW 0x0800
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#define TASK_NEW 0x0800
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#define TASK_STATE_MAX 0x1000
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#define TASK_STATE_MAX 0x1000
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@ -97,7 +97,8 @@ struct task_group;
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/* get_task_state(): */
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/* get_task_state(): */
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#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
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#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
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TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
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TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
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__TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE)
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__TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE | \
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TASK_PARKED)
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#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
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#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
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@ -1251,9 +1252,6 @@ static inline unsigned int __get_task_state(struct task_struct *tsk)
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BUILD_BUG_ON_NOT_POWER_OF_2(TASK_REPORT_MAX);
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BUILD_BUG_ON_NOT_POWER_OF_2(TASK_REPORT_MAX);
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if (tsk_state == TASK_PARKED)
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state = TASK_INTERRUPTIBLE;
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if (tsk_state == TASK_IDLE)
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if (tsk_state == TASK_IDLE)
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state = TASK_REPORT_IDLE;
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state = TASK_REPORT_IDLE;
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@ -1262,7 +1260,7 @@ static inline unsigned int __get_task_state(struct task_struct *tsk)
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static inline char __task_state_to_char(unsigned int state)
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static inline char __task_state_to_char(unsigned int state)
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{
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{
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static const char state_char[] = "RSDTtXZI";
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static const char state_char[] = "RSDTtXZPI";
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BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX) != sizeof(state_char) - 1);
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BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX) != sizeof(state_char) - 1);
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@ -160,7 +160,7 @@ TRACE_EVENT(sched_switch,
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__print_flags(__entry->prev_state & (TASK_REPORT_MAX - 1), "|",
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__print_flags(__entry->prev_state & (TASK_REPORT_MAX - 1), "|",
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{ 0x01, "S" }, { 0x02, "D" }, { 0x04, "T" },
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{ 0x01, "S" }, { 0x02, "D" }, { 0x04, "T" },
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{ 0x08, "t" }, { 0x10, "X" }, { 0x20, "Z" },
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{ 0x08, "t" }, { 0x10, "X" }, { 0x20, "Z" },
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{ 0x40, "I" }) :
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{ 0x40, "P" }, { 0x80, "I" }) :
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"R",
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"R",
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__entry->prev_state & TASK_STATE_MAX ? "+" : "",
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__entry->prev_state & TASK_STATE_MAX ? "+" : "",
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