diff options
| author | John Stultz <jstultz@google.com> | 2025-07-12 03:33:42 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-07-14 17:16:31 +0200 |
| commit | 25c411fce735dda29de26f58d3fce52d4824380c (patch) | |
| tree | 4869c00c94a3a7030ac85f6996d4226da9bcbe94 /kernel/sched/sched.h | |
| parent | 8f2146159b3a24d4fde0479c5e19f31908419004 (diff) | |
sched: Add CONFIG_SCHED_PROXY_EXEC & boot argument to enable/disable
Add a CONFIG_SCHED_PROXY_EXEC option, along with a boot argument
sched_proxy_exec= that can be used to disable the feature at boot
time if CONFIG_SCHED_PROXY_EXEC was enabled.
Also uses this option to allow the rq->donor to be different from
rq->curr.
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Link: https://lkml.kernel.org/r/20250712033407.2383110-2-jstultz@google.com
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index ac953fad8c21..e53d0b87f780 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1142,10 +1142,15 @@ struct rq { */ unsigned long nr_uninterruptible; +#ifdef CONFIG_SCHED_PROXY_EXEC + struct task_struct __rcu *donor; /* Scheduling context */ + struct task_struct __rcu *curr; /* Execution context */ +#else union { struct task_struct __rcu *donor; /* Scheduler context */ struct task_struct __rcu *curr; /* Execution context */ }; +#endif struct sched_dl_entity *dl_server; struct task_struct *idle; struct task_struct *stop; @@ -1326,10 +1331,17 @@ DECLARE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); #define cpu_curr(cpu) (cpu_rq(cpu)->curr) #define raw_rq() raw_cpu_ptr(&runqueues) +#ifdef CONFIG_SCHED_PROXY_EXEC +static inline void rq_set_donor(struct rq *rq, struct task_struct *t) +{ + rcu_assign_pointer(rq->donor, t); +} +#else static inline void rq_set_donor(struct rq *rq, struct task_struct *t) { /* Do nothing */ } +#endif #ifdef CONFIG_SCHED_CORE static inline struct cpumask *sched_group_span(struct sched_group *sg); |