tmakin/tegra-linux-noble
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sched/core: Introduce sched_set_rq_on/offline() helper

Browse Source 
BugLink: https://bugs.launchpad.net/bugs/2083656

commit 2f027354122f58ee846468a6f6b48672fff92e9b upstream.

Introduce sched_set_rq_on/offline() helper, so it can be called
in normal or error path simply. No functional changed.

Cc: stable@kernel.org
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240703031610.587047-4-yangyingliang@huaweicloud.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Yang Yingliang
2024-07-03 11:16:09 +08:00
committed by Mehmet Basaran
parent c922db98ce
commit 6568a2d86c
1 changed files with 26 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/sched/core.c
+26 -14
View File
@@ -9585,6 +9585,30 @@ void set_rq_offline(struct rq *rq)
}
}
static inline void sched_set_rq_online(struct rq *rq, int cpu)
{
struct rq_flags rf;
rq_lock_irqsave(rq, &rf);
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_online(rq);
}
rq_unlock_irqrestore(rq, &rf);
}
static inline void sched_set_rq_offline(struct rq *rq, int cpu)
{
struct rq_flags rf;
rq_lock_irqsave(rq, &rf);
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_offline(rq);
}
rq_unlock_irqrestore(rq, &rf);
}
/*
* used to mark begin/end of suspend/resume:
*/
@@ -9654,7 +9678,6 @@ static inline void sched_smt_present_dec(int cpu)
int sched_cpu_activate(unsigned int cpu)
{
struct rq *rq = cpu_rq(cpu);
struct rq_flags rf;
/*
* Clear the balance_push callback and prepare to schedule
@@ -9683,12 +9706,7 @@ int sched_cpu_activate(unsigned int cpu)
* 2) At runtime, if cpuset_cpu_active() fails to rebuild the
* domains.
*/
rq_lock_irqsave(rq, &rf);
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_online(rq);
}
rq_unlock_irqrestore(rq, &rf);
sched_set_rq_online(rq, cpu);
return 0;
}
@@ -9696,7 +9714,6 @@ int sched_cpu_activate(unsigned int cpu)
int sched_cpu_deactivate(unsigned int cpu)
{
struct rq *rq = cpu_rq(cpu);
struct rq_flags rf;
int ret;
/*
@@ -9727,12 +9744,7 @@ int sched_cpu_deactivate(unsigned int cpu)
*/
synchronize_rcu();
rq_lock_irqsave(rq, &rf);
if (rq->rd) {
BUG_ON(!cpumask_test_cpu(cpu, rq->rd->span));
set_rq_offline(rq);
}
rq_unlock_irqrestore(rq, &rf);
sched_set_rq_offline(rq, cpu);
/*
* When going down, decrement the number of cores with SMT present.