a896c5cfb3
* slmk/linux-4.14: simple_lmk: Remove unnecessary clean-up when timeout is reached simple_lmk: Hold an RCU read lock instead of the tasklist read lock mm: Don't stop kswapd on a per-node basis when there are no waiters simple_lmk: Consider all positive adjs when finding victims mm: vmpressure: Ignore allocation orders above PAGE_ALLOC_COSTLY_ORDER mm: Don't warn on page allocation failures for OOM-killed processes mm: Adjust tsk_is_oom_victim() for Simple LMK mm: vmpressure: Don't cache the window size mm: vmpressure: Interpret zero scanned pages as 100% pressure mm: vmpressure: Don't exclude any allocation types simple_lmk: Update adj targeting for Android 10 simple_lmk: Use vmpressure notifier to trigger kills mm: vmpressure: make vmpressure window variable mm: vmpressure: account allocstalls only on higher pressures mm: vmpressure: scale pressure based on reclaim context mm: vmpressure: allow in-kernel clients to subscribe for events mm, vmpressure: int cast vmpressure level/model for -1 comparison mm: Stop kswapd early when nothing's waiting for it to free pages simple_lmk: Include swap memory usage in the size of victims simple_lmk: Relax memory barriers and clean up some styling simple_lmk: Place victims onto SCHED_RR simple_lmk: Add a timeout to stop waiting for victims to die simple_lmk: Ignore tasks that won't free memory simple_lmk: Simplify tricks used to speed up the death process simple_lmk: Report mm as freed as soon as exit_mmap() finishes simple_lmk: Mark victim thread group with TIF_MEMDIE simple_lmk: Disable OOM killer when Simple LMK is enabled simple_lmk: Print a message when there are no processes to kill simple_lmk: Remove compat cruft not specific to 4.14 simple_lmk: Update copyright to 2020 simple_lmk: Don't queue up new reclaim requests during reclaim simple_lmk: Increase default minfree value simple_lmk: Clean up some code style nitpicks simple_lmk: Make reclaim deterministic simple_lmk: Fix broken multicopy atomicity for victims_to_kill simple_lmk: Use proper atomic_* operations where needed simple_lmk: Remove kthread_should_stop() exit condition simple_lmk: Fix pages_found calculation simple_lmk: Introduce Simple Low Memory Killer for Android Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com> Conflicts: kernel/exit.c kernel/fork.c mm/Makefile mm/vmpressure.c mm/vmscan.c
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __INCLUDE_LINUX_OOM_H
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#define __INCLUDE_LINUX_OOM_H
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#include <linux/sched/signal.h>
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#include <linux/types.h>
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#include <linux/nodemask.h>
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#include <uapi/linux/oom.h>
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#include <linux/sched/coredump.h> /* MMF_* */
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#include <linux/mm.h> /* VM_FAULT* */
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struct zonelist;
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struct notifier_block;
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struct mem_cgroup;
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struct task_struct;
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/*
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* Details of the page allocation that triggered the oom killer that are used to
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* determine what should be killed.
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*/
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struct oom_control {
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/* Used to determine cpuset */
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struct zonelist *zonelist;
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/* Used to determine mempolicy */
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nodemask_t *nodemask;
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/* Memory cgroup in which oom is invoked, or NULL for global oom */
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struct mem_cgroup *memcg;
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/* Used to determine cpuset and node locality requirement */
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const gfp_t gfp_mask;
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/*
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* order == -1 means the oom kill is required by sysrq, otherwise only
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* for display purposes.
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*/
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const int order;
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/* Used by oom implementation, do not set */
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unsigned long totalpages;
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struct task_struct *chosen;
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unsigned long chosen_points;
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};
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extern struct mutex oom_lock;
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static inline void set_current_oom_origin(void)
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{
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current->signal->oom_flag_origin = true;
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}
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static inline void clear_current_oom_origin(void)
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{
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current->signal->oom_flag_origin = false;
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}
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static inline bool oom_task_origin(const struct task_struct *p)
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{
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return p->signal->oom_flag_origin;
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}
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static inline bool tsk_is_oom_victim(struct task_struct * tsk)
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{
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#ifdef CONFIG_ANDROID_SIMPLE_LMK
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return test_ti_thread_flag(task_thread_info(tsk), TIF_MEMDIE);
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#else
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return tsk->signal->oom_mm;
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#endif
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}
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/*
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* Use this helper if tsk->mm != mm and the victim mm needs a special
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* handling. This is guaranteed to stay true after once set.
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*/
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static inline bool mm_is_oom_victim(struct mm_struct *mm)
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{
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return test_bit(MMF_OOM_VICTIM, &mm->flags);
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}
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/*
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* Checks whether a page fault on the given mm is still reliable.
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* This is no longer true if the oom reaper started to reap the
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* address space which is reflected by MMF_UNSTABLE flag set in
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* the mm. At that moment any !shared mapping would lose the content
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* and could cause a memory corruption (zero pages instead of the
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* original content).
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*
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* User should call this before establishing a page table entry for
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* a !shared mapping and under the proper page table lock.
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*
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* Return 0 when the PF is safe VM_FAULT_SIGBUS otherwise.
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*/
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static inline int check_stable_address_space(struct mm_struct *mm)
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{
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if (unlikely(test_bit(MMF_UNSTABLE, &mm->flags)))
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return VM_FAULT_SIGBUS;
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return 0;
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}
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void __oom_reap_task_mm(struct mm_struct *mm);
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extern unsigned long oom_badness(struct task_struct *p,
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struct mem_cgroup *memcg, const nodemask_t *nodemask,
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unsigned long totalpages);
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extern bool out_of_memory(struct oom_control *oc);
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extern void exit_oom_victim(void);
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extern int register_oom_notifier(struct notifier_block *nb);
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extern int unregister_oom_notifier(struct notifier_block *nb);
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extern bool oom_killer_disable(signed long timeout);
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extern void oom_killer_enable(void);
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extern struct task_struct *find_lock_task_mm(struct task_struct *p);
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extern void dump_tasks(struct mem_cgroup *memcg,
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const nodemask_t *nodemask);
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extern void wake_oom_reaper(struct task_struct *tsk);
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/* sysctls */
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extern int sysctl_oom_dump_tasks;
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extern int sysctl_oom_kill_allocating_task;
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extern int sysctl_panic_on_oom;
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#endif /* _INCLUDE_LINUX_OOM_H */
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