diff options
| author | Waiman Long <longman@redhat.com> | 2022-09-22 14:00:38 -0400 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-27 11:01:22 +0200 |
| commit | 8f9ea86fdf99b81458cc21fc1c591fcd4a0fa1f4 (patch) | |
| tree | 43639cec1cbe2b23961c078f9062ab051019f65a /kernel/sched/sched.h | |
| parent | 713a2e21a5137e96d2594f53d19784ffde3ddbd0 (diff) | |
sched: Always preserve the user requested cpumask
Unconditionally preserve the user requested cpumask on
sched_setaffinity() calls. This allows using it outside of the fairly
narrow restrict_cpus_allowed_ptr() use-case and fix some cpuset issues
that currently suffer destruction of cpumasks.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220922180041.1768141-3-longman@redhat.com
Diffstat (limited to 'kernel/sched/sched.h')
| -rw-r--r-- | kernel/sched/sched.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 6c91fb78e04e..04f571df385f 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1878,6 +1878,13 @@ static inline void dirty_sched_domain_sysctl(int cpu) #endif extern int sched_update_scaling(void); + +static inline const struct cpumask *task_user_cpus(struct task_struct *p) +{ + if (!p->user_cpus_ptr) + return cpu_possible_mask; /* &init_task.cpus_mask */ + return p->user_cpus_ptr; +} #endif /* CONFIG_SMP */ #include "stats.h" @@ -2147,6 +2154,7 @@ extern const u32 sched_prio_to_wmult[40]; struct affinity_context { const struct cpumask *new_mask; + struct cpumask *user_mask; unsigned int flags; }; |