mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
130 lines
3.3 KiB
130 lines
3.3 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef __INCLUDE_LINUX_OOM_H |
|
#define __INCLUDE_LINUX_OOM_H |
|
|
|
|
|
#include <linux/sched/signal.h> |
|
#include <linux/types.h> |
|
#include <linux/nodemask.h> |
|
#include <uapi/linux/oom.h> |
|
#include <linux/sched/coredump.h> /* MMF_* */ |
|
#include <linux/mm.h> /* VM_FAULT* */ |
|
|
|
struct zonelist; |
|
struct notifier_block; |
|
struct mem_cgroup; |
|
struct task_struct; |
|
|
|
enum oom_constraint { |
|
CONSTRAINT_NONE, |
|
CONSTRAINT_CPUSET, |
|
CONSTRAINT_MEMORY_POLICY, |
|
CONSTRAINT_MEMCG, |
|
}; |
|
|
|
/* |
|
* Details of the page allocation that triggered the oom killer that are used to |
|
* determine what should be killed. |
|
*/ |
|
struct oom_control { |
|
/* Used to determine cpuset */ |
|
struct zonelist *zonelist; |
|
|
|
/* Used to determine mempolicy */ |
|
nodemask_t *nodemask; |
|
|
|
/* Memory cgroup in which oom is invoked, or NULL for global oom */ |
|
struct mem_cgroup *memcg; |
|
|
|
/* Used to determine cpuset and node locality requirement */ |
|
const gfp_t gfp_mask; |
|
|
|
/* |
|
* order == -1 means the oom kill is required by sysrq, otherwise only |
|
* for display purposes. |
|
*/ |
|
const int order; |
|
|
|
/* Used by oom implementation, do not set */ |
|
unsigned long totalpages; |
|
struct task_struct *chosen; |
|
long chosen_points; |
|
|
|
/* Used to print the constraint info. */ |
|
enum oom_constraint constraint; |
|
}; |
|
|
|
extern struct mutex oom_lock; |
|
extern struct mutex oom_adj_mutex; |
|
|
|
static inline void set_current_oom_origin(void) |
|
{ |
|
current->signal->oom_flag_origin = true; |
|
} |
|
|
|
static inline void clear_current_oom_origin(void) |
|
{ |
|
current->signal->oom_flag_origin = false; |
|
} |
|
|
|
static inline bool oom_task_origin(const struct task_struct *p) |
|
{ |
|
return p->signal->oom_flag_origin; |
|
} |
|
|
|
static inline bool tsk_is_oom_victim(struct task_struct * tsk) |
|
{ |
|
return tsk->signal->oom_mm; |
|
} |
|
|
|
/* |
|
* Use this helper if tsk->mm != mm and the victim mm needs a special |
|
* handling. This is guaranteed to stay true after once set. |
|
*/ |
|
static inline bool mm_is_oom_victim(struct mm_struct *mm) |
|
{ |
|
return test_bit(MMF_OOM_VICTIM, &mm->flags); |
|
} |
|
|
|
/* |
|
* Checks whether a page fault on the given mm is still reliable. |
|
* This is no longer true if the oom reaper started to reap the |
|
* address space which is reflected by MMF_UNSTABLE flag set in |
|
* the mm. At that moment any !shared mapping would lose the content |
|
* and could cause a memory corruption (zero pages instead of the |
|
* original content). |
|
* |
|
* User should call this before establishing a page table entry for |
|
* a !shared mapping and under the proper page table lock. |
|
* |
|
* Return 0 when the PF is safe VM_FAULT_SIGBUS otherwise. |
|
*/ |
|
static inline vm_fault_t check_stable_address_space(struct mm_struct *mm) |
|
{ |
|
if (unlikely(test_bit(MMF_UNSTABLE, &mm->flags))) |
|
return VM_FAULT_SIGBUS; |
|
return 0; |
|
} |
|
|
|
bool __oom_reap_task_mm(struct mm_struct *mm); |
|
|
|
long oom_badness(struct task_struct *p, |
|
unsigned long totalpages); |
|
|
|
extern bool out_of_memory(struct oom_control *oc); |
|
|
|
extern void exit_oom_victim(void); |
|
|
|
extern int register_oom_notifier(struct notifier_block *nb); |
|
extern int unregister_oom_notifier(struct notifier_block *nb); |
|
|
|
extern bool oom_killer_disable(signed long timeout); |
|
extern void oom_killer_enable(void); |
|
|
|
extern struct task_struct *find_lock_task_mm(struct task_struct *p); |
|
|
|
/* sysctls */ |
|
extern int sysctl_oom_dump_tasks; |
|
extern int sysctl_oom_kill_allocating_task; |
|
extern int sysctl_panic_on_oom; |
|
#endif /* _INCLUDE_LINUX_OOM_H */
|
|
|