mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-28 16:56:26 +00:00
f2f484085e
The types of mm flags are now far beyond the core dump related features. This patch moves mm flags from linux/sched/coredump.h to linux/mm_types.h. The linux/sched/coredump.h has include the mm_types.h, so the C files related to coredump does not need to change head file inclusion. In addition, the inclusion of sched/coredump.h now can be deleted from the C files that irrelevant to core dump. Link: https://lkml.kernel.org/r/20240926074922.2721274-1-sunnanyong@huawei.com Signed-off-by: Nanyong Sun <sunnanyong@huawei.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Matthew Wilcox <willy@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/* 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/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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
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);
|
|
|
|
#endif /* _INCLUDE_LINUX_OOM_H */
|