Commit 8ef9925b authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar

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: default avatarPeter 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: default avatarIngo Molnar <mingo@kernel.org>
parent 5d68cc95
......@@ -128,9 +128,10 @@ static const char * const task_state_array[] = {
"t (tracing stop)", /* 0x08 */
"X (dead)", /* 0x10 */
"Z (zombie)", /* 0x20 */
"P (parked)", /* 0x40 */
/* states beyond TASK_REPORT: */
"I (idle)", /* 0x40 */
"I (idle)", /* 0x80 */
};
static inline const char *get_task_state(struct task_struct *tsk)
......
......@@ -75,10 +75,10 @@ struct task_group;
#define EXIT_ZOMBIE 0x0020
#define EXIT_TRACE (EXIT_ZOMBIE | EXIT_DEAD)
/* Used in tsk->state again: */
#define TASK_DEAD 0x0040
#define TASK_WAKEKILL 0x0080
#define TASK_WAKING 0x0100
#define TASK_PARKED 0x0200
#define TASK_PARKED 0x0040
#define TASK_DEAD 0x0080
#define TASK_WAKEKILL 0x0100
#define TASK_WAKING 0x0200
#define TASK_NOLOAD 0x0400
#define TASK_NEW 0x0800
#define TASK_STATE_MAX 0x1000
......@@ -97,7 +97,8 @@ struct task_group;
/* get_task_state(): */
#define TASK_REPORT (TASK_RUNNING | TASK_INTERRUPTIBLE | \
TASK_UNINTERRUPTIBLE | __TASK_STOPPED | \
__TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE)
__TASK_TRACED | EXIT_DEAD | EXIT_ZOMBIE | \
TASK_PARKED)
#define task_is_traced(task) ((task->state & __TASK_TRACED) != 0)
......@@ -1251,9 +1252,6 @@ static inline unsigned int __get_task_state(struct task_struct *tsk)
BUILD_BUG_ON_NOT_POWER_OF_2(TASK_REPORT_MAX);
if (tsk_state == TASK_PARKED)
state = TASK_INTERRUPTIBLE;
if (tsk_state == TASK_IDLE)
state = TASK_REPORT_IDLE;
......@@ -1262,7 +1260,7 @@ static inline unsigned int __get_task_state(struct task_struct *tsk)
static inline char __task_state_to_char(unsigned int state)
{
static const char state_char[] = "RSDTtXZI";
static const char state_char[] = "RSDTtXZPI";
BUILD_BUG_ON(1 + ilog2(TASK_REPORT_MAX) != sizeof(state_char) - 1);
......
......@@ -160,7 +160,7 @@ TRACE_EVENT(sched_switch,
__print_flags(__entry->prev_state & (TASK_REPORT_MAX - 1), "|",
{ 0x01, "S" }, { 0x02, "D" }, { 0x04, "T" },
{ 0x08, "t" }, { 0x10, "X" }, { 0x20, "Z" },
{ 0x40, "I" }) :
{ 0x40, "P" }, { 0x80, "I" }) :
"R",
__entry->prev_state & TASK_STATE_MAX ? "+" : "",
......
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