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cgroup/cpuset: add callback_lock helper

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To modify cpuset, both cpuset_mutex and callback_lock are needed. Add
helpers for cpuset-v1 to get callback_lock.

Signed-off-by: Chen Ridong <chenridong@huawei.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Chen Ridong 2024-08-30 10:02:23 +00:00 committed by Tejun Heo
parent 90eec9548d
commit 530020f28f
2 changed files with 12 additions and 0 deletions
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2
kernel/cgroup/cpuset-internal.h
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@ -239,6 +239,8 @@ static inline int is_spread_slab(const struct cpuset *cs)
}
void rebuild_sched_domains_locked(void);
void callback_lock_irq(void);
void callback_unlock_irq(void);
/*
* cpuset-v1.c

10
kernel/cgroup/cpuset.c
View File

@ -275,6 +275,16 @@ void cpuset_unlock(void)
static DEFINE_SPINLOCK(callback_lock);
void callback_lock_irq(void)
{
spin_lock_irq(&callback_lock);
}
void callback_unlock_irq(void)
{
spin_unlock_irq(&callback_lock);
}
static struct workqueue_struct *cpuset_migrate_mm_wq;
static DECLARE_WAIT_QUEUE_HEAD(cpuset_attach_wq);