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author | Rakib Mullick <rakib.mullick@gmail.com> | 2010-10-24 10:28:47 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-10-24 11:29:01 (GMT) |
commit | d4a6f3c32c39132318454e77d59ab14b06f6eb02 (patch) | |
tree | c693c2293b9183df06f5a5891659fe2090425bff /kernel/sched_stats.h | |
parent | b2b5ce022acf5e9f52f7b78c5579994fdde191d4 (diff) | |
download | linux-fsl-qoriq-d4a6f3c32c39132318454e77d59ab14b06f6eb02.tar.xz |
sched_stat: Update sched_info_queue/dequeue() code comments
Remove some sched_info_queue(), sched_info_dequeue() code comment.
We no longer belongs to the era of O(1) and we don't use active or expired
array anymore.
Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <AANLkTi=REu0WzOp5N=nVT1=ZJ=ZA+MZFV+4CHSJ3Q-Yv@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched_stats.h')
-rw-r--r-- | kernel/sched_stats.h | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h index 25c2f96..48ddf43 100644 --- a/kernel/sched_stats.h +++ b/kernel/sched_stats.h @@ -157,15 +157,7 @@ static inline void sched_info_reset_dequeued(struct task_struct *t) } /* - * Called when a process is dequeued from the active array and given - * the cpu. We should note that with the exception of interactive - * tasks, the expired queue will become the active queue after the active - * queue is empty, without explicitly dequeuing and requeuing tasks in the - * expired queue. (Interactive tasks may be requeued directly to the - * active queue, thus delaying tasks in the expired queue from running; - * see scheduler_tick()). - * - * Though we are interested in knowing how long it was from the *first* time a + * We are interested in knowing how long it was from the *first* time a * task was queued to the time that it finally hit a cpu, we call this routine * from dequeue_task() to account for possible rq->clock skew across cpus. The * delta taken on each cpu would annul the skew. @@ -203,16 +195,6 @@ static void sched_info_arrive(struct task_struct *t) } /* - * Called when a process is queued into either the active or expired - * array. The time is noted and later used to determine how long we - * had to wait for us to reach the cpu. Since the expired queue will - * become the active queue after active queue is empty, without dequeuing - * and requeuing any tasks, we are interested in queuing to either. It - * is unusual but not impossible for tasks to be dequeued and immediately - * requeued in the same or another array: this can happen in sched_yield(), - * set_user_nice(), and even load_balance() as it moves tasks from runqueue - * to runqueue. - * * This function is only called from enqueue_task(), but also only updates * the timestamp if it is already not set. It's assumed that * sched_info_dequeued() will clear that stamp when appropriate. |