This patch introduces the basic API for setting freeze priority on a per-task basis. The actual usage and policy for assigning specific priorities will be added in subsequent patches. This change lays the groundwork for implementing a more flexible and dependency-aware freezer model. Signed-off-by: Zihuan Zhang --- include/linux/freezer.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/linux/freezer.h b/include/linux/freezer.h index 6314f8b68035..f231a60c3120 100644 --- a/include/linux/freezer.h +++ b/include/linux/freezer.h @@ -46,6 +46,18 @@ static inline bool freezing(struct task_struct *p) return false; } +static inline bool freeze_set_default_priority(struct task_struct *p, unsigned int prio) +{ + if ((p->flags & PF_KTHREAD) || prio > FREEZE_PRIORITY_NEVER) + return false; + + p->freeze_priority = prio; + + pr_debug("set default freeze priority for comm:%s pid:%d prio:%d\n", + p->comm, p->pid, p->freeze_priority); + return true; +} + /* Takes and releases task alloc lock using task_lock() */ extern void __thaw_task(struct task_struct *t); @@ -80,6 +92,7 @@ static inline bool cgroup_freezing(struct task_struct *task) #else /* !CONFIG_FREEZER */ static inline bool frozen(struct task_struct *p) { return false; } static inline bool freezing(struct task_struct *p) { return false; } +static inline bool freeze_set_default_priority(struct task_struct *p, unsigned int prio) {} static inline void __thaw_task(struct task_struct *t) {} static inline bool __refrigerator(bool check_kthr_stop) { return false; } -- 2.25.1