[PATCH 1/2] sched/deadline: fix comment in push_dl_tasks

[PATCH 1/2] sched/deadline: fix comment in push_dl_tasks

[Andrea Parri]

The comment is "misleading"; fix it by adapting a comment from
push_rt_tasks.

Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 0a17af35..7c17001 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1563,7 +1563,7 @@ out:
 
 static void push_dl_tasks(struct rq *rq)
 {
-	/* Terminates as it moves a -deadline task */
+	/* push_dl_task will return true if it moved a -deadline task */
 	while (push_dl_task(rq))
 		;
 }
-- 
1.9.1

[PATCH 2/2] sched/deadline: fix comment in enqueue_task_dl

[Andrea Parri]

The flag "dl_boosted" is set by comparing *absolute* deadlines
(c.f., rt_mutex_setprio).

Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 7c17001..be2ca5e 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -953,7 +953,7 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags)
 
 	/*
 	 * Use the scheduling parameters of the top pi-waiter
-	 * task if we have one and its (relative) deadline is
+	 * task if we have one and its (absolute) deadline is
 	 * smaller than our one... OTW we keep our runtime and
 	 * deadline.
 	 */
-- 
1.9.1

Re: [PATCH 2/2] sched/deadline: fix comment in enqueue_task_dl

[Juri Lelli]

Hi,

On 05/08/15 14:56, Andrea Parri wrote:
> The flag "dl_boosted" is set by comparing *absolute* deadlines
> (c.f., rt_mutex_setprio).
> 
> Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
> ---
>  kernel/sched/deadline.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
> index 7c17001..be2ca5e 100644
> --- a/kernel/sched/deadline.c
> +++ b/kernel/sched/deadline.c
> @@ -953,7 +953,7 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags)
>  
>  	/*
>  	 * Use the scheduling parameters of the top pi-waiter
> -	 * task if we have one and its (relative) deadline is
> +	 * task if we have one and its (absolute) deadline is
>  	 * smaller than our one... OTW we keep our runtime and
>  	 * deadline.
>  	 */
> 

Right, thanks for spotting it.

Best,

- Juri

[tip:sched/core] sched/deadline: Fix comment in enqueue_task_dl()

[tip-bot for Andrea Parri]

Commit-ID:  ff277d4250fe715b6666219b1a3423b863418794
Gitweb:     http://git.kernel.org/tip/ff277d4250fe715b6666219b1a3423b863418794
Author:     Andrea Parri <parri.andrea@gmail.com>
AuthorDate: Wed, 5 Aug 2015 15:56:19 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 12 Aug 2015 12:06:10 +0200

sched/deadline: Fix comment in enqueue_task_dl()

The "dl_boosted" flag is set by comparing *absolute* deadlines
(c.f., rt_mutex_setprio()).

Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1438782979-9057-2-git-send-email-parri.andrea@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 82c0dd0..fc8f010 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -953,7 +953,7 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags)
 
 	/*
 	 * Use the scheduling parameters of the top pi-waiter
-	 * task if we have one and its (relative) deadline is
+	 * task if we have one and its (absolute) deadline is
 	 * smaller than our one... OTW we keep our runtime and
 	 * deadline.
 	 */

Re: [PATCH 1/2] sched/deadline: fix comment in push_dl_tasks

[Juri Lelli]

Hi Andrea,

On 05/08/15 14:56, Andrea Parri wrote:
> The comment is "misleading"; fix it by adapting a comment from
> push_rt_tasks.
> 
> Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
> ---
>  kernel/sched/deadline.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
> index 0a17af35..7c17001 100644
> --- a/kernel/sched/deadline.c
> +++ b/kernel/sched/deadline.c
> @@ -1563,7 +1563,7 @@ out:
>  
>  static void push_dl_tasks(struct rq *rq)
>  {
> -	/* Terminates as it moves a -deadline task */
> +	/* push_dl_task will return true if it moved a -deadline task */
>  	while (push_dl_task(rq))
>  		;
>  }
> 

Looks good, thanks!

Best,

- Juri

[tip:sched/core] sched/deadline: Fix comment in push_dl_tasks()

[tip-bot for Andrea Parri]

Commit-ID:  4ffa08ed4cc4c5d47d197d749aae6f79af91eb73
Gitweb:     http://git.kernel.org/tip/4ffa08ed4cc4c5d47d197d749aae6f79af91eb73
Author:     Andrea Parri <parri.andrea@gmail.com>
AuthorDate: Wed, 5 Aug 2015 15:56:18 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 12 Aug 2015 12:06:10 +0200

sched/deadline: Fix comment in push_dl_tasks()

The comment is "misleading"; fix it by adapting a comment from
push_rt_tasks().

Signed-off-by: Andrea Parri <parri.andrea@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1438782979-9057-1-git-send-email-parri.andrea@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index b473056..82c0dd0 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1563,7 +1563,7 @@ out:
 
 static void push_dl_tasks(struct rq *rq)
 {
-	/* Terminates as it moves a -deadline task */
+	/* push_dl_task() will return true if it moved a -deadline task */
 	while (push_dl_task(rq))
 		;
 }