1 #ifndef __INCLUDE_LINUX_OOM_H 2 #define __INCLUDE_LINUX_OOM_H 3 4 5 #include <linux/sched.h> 6 #include <linux/types.h> 7 #include <linux/nodemask.h> 8 #include <uapi/linux/oom.h> 9 10 struct zonelist; 11 struct notifier_block; 12 struct mem_cgroup; 13 struct task_struct; 14 15 /* 16 * Types of limitations to the nodes from which allocations may occur 17 */ 18 enum oom_constraint { 19 CONSTRAINT_NONE, 20 CONSTRAINT_CPUSET, 21 CONSTRAINT_MEMORY_POLICY, 22 CONSTRAINT_MEMCG, 23 }; 24 25 enum oom_scan_t { 26 OOM_SCAN_OK, /* scan thread and find its badness */ 27 OOM_SCAN_CONTINUE, /* do not consider thread for oom kill */ 28 OOM_SCAN_ABORT, /* abort the iteration and return */ 29 OOM_SCAN_SELECT, /* always select this thread first */ 30 }; 31 32 extern void compare_swap_oom_score_adj(int old_val, int new_val); 33 extern int test_set_oom_score_adj(int new_val); 34 35 extern unsigned long oom_badness(struct task_struct *p, 36 struct mem_cgroup *memcg, const nodemask_t *nodemask, 37 unsigned long totalpages); 38 extern void oom_kill_process(struct task_struct *p, gfp_t gfp_mask, int order, 39 unsigned int points, unsigned long totalpages, 40 struct mem_cgroup *memcg, nodemask_t *nodemask, 41 const char *message); 42 43 extern int try_set_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 44 extern void clear_zonelist_oom(struct zonelist *zonelist, gfp_t gfp_flags); 45 46 extern void check_panic_on_oom(enum oom_constraint constraint, gfp_t gfp_mask, 47 int order, const nodemask_t *nodemask); 48 49 extern enum oom_scan_t oom_scan_process_thread(struct task_struct *task, 50 unsigned long totalpages, const nodemask_t *nodemask, 51 bool force_kill); 52 extern void mem_cgroup_out_of_memory(struct mem_cgroup *memcg, gfp_t gfp_mask, 53 int order); 54 55 extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, 56 int order, nodemask_t *mask, bool force_kill); 57 extern int register_oom_notifier(struct notifier_block *nb); 58 extern int unregister_oom_notifier(struct notifier_block *nb); 59 60 extern bool oom_killer_disabled; 61 62 static inline void oom_killer_disable(void) 63 { 64 oom_killer_disabled = true; 65 } 66 67 static inline void oom_killer_enable(void) 68 { 69 oom_killer_disabled = false; 70 } 71 72 extern struct task_struct *find_lock_task_mm(struct task_struct *p); 73 74 /* sysctls */ 75 extern int sysctl_oom_dump_tasks; 76 extern int sysctl_oom_kill_allocating_task; 77 extern int sysctl_panic_on_oom; 78 #endif /* _INCLUDE_LINUX_OOM_H */ 79