* [PATCH] sched/fair: Use __this_cpu_read() in wake_wide()
@ 2020-04-21 14:41 Muchun Song
2020-05-01 18:22 ` [tip: sched/core] " tip-bot2 for Muchun Song
0 siblings, 1 reply; 2+ messages in thread
From: Muchun Song @ 2020-04-21 14:41 UTC (permalink / raw)
To: mingo, peterz, juri.lelli, vincent.guittot, dietmar.eggemann,
rostedt, bsegall, mgorman
Cc: linux-kernel, Muchun Song
The code is executed with preemption(and interrupts) disabled,
so it's safe to use __this_cpu_write().
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 870853c47b63c..356660ec4ff3e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5705,7 +5705,7 @@ static int wake_wide(struct task_struct *p)
{
unsigned int master = current->wakee_flips;
unsigned int slave = p->wakee_flips;
- int factor = this_cpu_read(sd_llc_size);
+ int factor = __this_cpu_read(sd_llc_size);
if (master < slave)
swap(master, slave);
--
2.11.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [tip: sched/core] sched/fair: Use __this_cpu_read() in wake_wide()
2020-04-21 14:41 [PATCH] sched/fair: Use __this_cpu_read() in wake_wide() Muchun Song
@ 2020-05-01 18:22 ` tip-bot2 for Muchun Song
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot2 for Muchun Song @ 2020-05-01 18:22 UTC (permalink / raw)
To: linux-tip-commits; +Cc: Muchun Song, Peter Zijlstra (Intel), x86, LKML
The following commit has been merged into the sched/core branch of tip:
Commit-ID: 17c891ab349138e8d8a59ca2700f42ce8af96f4e
Gitweb: https://git.kernel.org/tip/17c891ab349138e8d8a59ca2700f42ce8af96f4e
Author: Muchun Song <songmuchun@bytedance.com>
AuthorDate: Tue, 21 Apr 2020 22:41:23 +08:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Thu, 30 Apr 2020 20:14:41 +02:00
sched/fair: Use __this_cpu_read() in wake_wide()
The code is executed with preemption(and interrupts) disabled,
so it's safe to use __this_cpu_write().
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200421144123.33580-1-songmuchun@bytedance.com
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index cd7fd7e..46b7bd4 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5718,7 +5718,7 @@ static int wake_wide(struct task_struct *p)
{
unsigned int master = current->wakee_flips;
unsigned int slave = p->wakee_flips;
- int factor = this_cpu_read(sd_llc_size);
+ int factor = __this_cpu_read(sd_llc_size);
if (master < slave)
swap(master, slave);
^ permalink raw reply related [flat|nested] 2+ messages in thread
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2020-04-21 14:41 [PATCH] sched/fair: Use __this_cpu_read() in wake_wide() Muchun Song
2020-05-01 18:22 ` [tip: sched/core] " tip-bot2 for Muchun Song
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