* [PATCH] sched/core: emove unnecessary initialization in sched_init()
@ 2016-09-14 2:18 Cheng Chao
2016-09-14 2:23 ` [PATCH v2] sched/core: remove " Cheng Chao
2016-09-22 13:58 ` [tip:sched/core] sched/core: Remove " tip-bot for Cheng Chao
0 siblings, 2 replies; 4+ messages in thread
From: Cheng Chao @ 2016-09-14 2:18 UTC (permalink / raw)
To: mingo, peterz; +Cc: linux-kernel, Cheng Chao, stable
init_idle() is called immediately after current->sched_class
= &fair_sched_class, init_idle() sets current->sched_class
= &idle_sched_class.
Signed-off-by: Cheng Chao <cs.os.kernel@gmail.com>
Cc: stable@vger.kernel.org
---
kernel/sched/core.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a0086a5..ed4f4fe 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7557,11 +7557,6 @@ void __init sched_init(void)
enter_lazy_tlb(&init_mm, current);
/*
- * During early bootup we pretend to be a normal task:
- */
- current->sched_class = &fair_sched_class;
-
- /*
* Make us the idle thread. Technically, schedule() should not be
* called from this thread, however somewhere below it might be,
* but because we are the idle thread, we just pick up running again
--
2.4.11
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH v2] sched/core: remove unnecessary initialization in sched_init()
2016-09-14 2:18 [PATCH] sched/core: emove unnecessary initialization in sched_init() Cheng Chao
@ 2016-09-14 2:23 ` Cheng Chao
2016-09-18 1:59 ` Cheng Chao
2016-09-22 13:58 ` [tip:sched/core] sched/core: Remove " tip-bot for Cheng Chao
1 sibling, 1 reply; 4+ messages in thread
From: Cheng Chao @ 2016-09-14 2:23 UTC (permalink / raw)
To: mingo, peterz; +Cc: linux-kernel, Cheng Chao, stable
init_idle() is called immediately after current->sched_class
= &fair_sched_class, init_idle() sets current->sched_class
= &idle_sched_class.
Signed-off-by: Cheng Chao <cs.os.kernel@gmail.com>
Cc: stable@vger.kernel.org
---
kernel/sched/core.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a0086a5..ed4f4fe 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7557,11 +7557,6 @@ void __init sched_init(void)
enter_lazy_tlb(&init_mm, current);
/*
- * During early bootup we pretend to be a normal task:
- */
- current->sched_class = &fair_sched_class;
-
- /*
* Make us the idle thread. Technically, schedule() should not be
* called from this thread, however somewhere below it might be,
* but because we are the idle thread, we just pick up running again
--
2.4.11
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH v2] sched/core: remove unnecessary initialization in sched_init()
2016-09-14 2:23 ` [PATCH v2] sched/core: remove " Cheng Chao
@ 2016-09-18 1:59 ` Cheng Chao
0 siblings, 0 replies; 4+ messages in thread
From: Cheng Chao @ 2016-09-18 1:59 UTC (permalink / raw)
To: peterz; +Cc: mingo, linux-kernel, stable
Hi Peter,
Would you please review this patch? thanks.
Cheng
on 09/14/2016 10:23 AM, Cheng Chao wrote:
> init_idle() is called immediately after current->sched_class
> = &fair_sched_class, init_idle() sets current->sched_class
> = &idle_sched_class.
>
> Signed-off-by: Cheng Chao <cs.os.kernel@gmail.com>
> Cc: stable@vger.kernel.org
> ---
> kernel/sched/core.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index a0086a5..ed4f4fe 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -7557,11 +7557,6 @@ void __init sched_init(void)
> enter_lazy_tlb(&init_mm, current);
>
> /*
> - * During early bootup we pretend to be a normal task:
> - */
> - current->sched_class = &fair_sched_class;
> -
> - /*
> * Make us the idle thread. Technically, schedule() should not be
> * called from this thread, however somewhere below it might be,
> * but because we are the idle thread, we just pick up running again
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* [tip:sched/core] sched/core: Remove unnecessary initialization in sched_init()
2016-09-14 2:18 [PATCH] sched/core: emove unnecessary initialization in sched_init() Cheng Chao
2016-09-14 2:23 ` [PATCH v2] sched/core: remove " Cheng Chao
@ 2016-09-22 13:58 ` tip-bot for Cheng Chao
1 sibling, 0 replies; 4+ messages in thread
From: tip-bot for Cheng Chao @ 2016-09-22 13:58 UTC (permalink / raw)
To: linux-tip-commits
Cc: tglx, cs.os.kernel, mingo, peterz, hpa, torvalds, linux-kernel
Commit-ID: 0b8473570ce1af3e80da05b59f9321f30253de4d
Gitweb: http://git.kernel.org/tip/0b8473570ce1af3e80da05b59f9321f30253de4d
Author: Cheng Chao <cs.os.kernel@gmail.com>
AuthorDate: Wed, 14 Sep 2016 10:18:56 +0800
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 22 Sep 2016 14:53:44 +0200
sched/core: Remove unnecessary initialization in sched_init()
init_idle() is called immediately after:
current->sched_class = &fair_sched_class;
init_idle() sets:
current->sched_class = &idle_sched_class;
First assignment is superfluous.
Signed-off-by: Cheng Chao <cs.os.kernel@gmail.com>
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>
Link: http://lkml.kernel.org/r/1473819536-7398-1-git-send-email-cs.os.kernel@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
kernel/sched/core.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 860070f..c5f020c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -7558,11 +7558,6 @@ void __init sched_init(void)
enter_lazy_tlb(&init_mm, current);
/*
- * During early bootup we pretend to be a normal task:
- */
- current->sched_class = &fair_sched_class;
-
- /*
* Make us the idle thread. Technically, schedule() should not be
* called from this thread, however somewhere below it might be,
* but because we are the idle thread, we just pick up running again
^ permalink raw reply related [flat|nested] 4+ messages in thread
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