Contributors: 32
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Andrew Morton |
367 |
32.71% |
2 |
2.53% |
| Lee Schermerhorn |
162 |
14.44% |
9 |
11.39% |
| Christoph Lameter |
123 |
10.96% |
9 |
11.39% |
| Paul Jackson |
73 |
6.51% |
4 |
5.06% |
| Hugh Dickins |
70 |
6.24% |
4 |
5.06% |
| Mel Gorman |
62 |
5.53% |
6 |
7.59% |
| David Rientjes |
52 |
4.63% |
7 |
8.86% |
| Oleg Nesterov |
38 |
3.39% |
2 |
2.53% |
| Greg Ungerer |
35 |
3.12% |
1 |
1.27% |
| Andi Kleen |
26 |
2.32% |
3 |
3.80% |
| Linus Torvalds (pre-git) |
22 |
1.96% |
8 |
10.13% |
| Ben Widawsky |
20 |
1.78% |
2 |
2.53% |
| Feng Tang |
15 |
1.34% |
2 |
2.53% |
| Linus Torvalds |
6 |
0.53% |
1 |
1.27% |
| Donet Tom |
6 |
0.53% |
1 |
1.27% |
| Motohiro Kosaki |
5 |
0.45% |
1 |
1.27% |
| Stephen Wilson |
4 |
0.36% |
1 |
1.27% |
| Vlastimil Babka |
4 |
0.36% |
1 |
1.27% |
| Aneesh Kumar K.V |
4 |
0.36% |
1 |
1.27% |
| Ralf Baechle |
3 |
0.27% |
1 |
1.27% |
| Ingo Molnar |
3 |
0.27% |
2 |
2.53% |
| David Howells |
3 |
0.27% |
1 |
1.27% |
| Robin Holt |
3 |
0.27% |
1 |
1.27% |
| Martin J. Bligh |
3 |
0.27% |
1 |
1.27% |
| Kefeng Wang |
3 |
0.27% |
1 |
1.27% |
| Song Muchun |
2 |
0.18% |
1 |
1.27% |
| David S. Miller |
2 |
0.18% |
1 |
1.27% |
| Li Xinhai |
2 |
0.18% |
1 |
1.27% |
| Yaowei Bai |
1 |
0.09% |
1 |
1.27% |
| Yanfei Xu |
1 |
0.09% |
1 |
1.27% |
| Nathan Zimmer |
1 |
0.09% |
1 |
1.27% |
| Greg Kroah-Hartman |
1 |
0.09% |
1 |
1.27% |
| Total |
1122 |
|
79 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* NUMA memory policies for Linux.
* Copyright 2003,2004 Andi Kleen SuSE Labs
*/
#ifndef _LINUX_MEMPOLICY_H
#define _LINUX_MEMPOLICY_H 1
#include <linux/sched.h>
#include <linux/mmzone.h>
#include <linux/slab.h>
#include <linux/rbtree.h>
#include <linux/spinlock.h>
#include <linux/nodemask.h>
#include <linux/pagemap.h>
#include <uapi/linux/mempolicy.h>
struct mm_struct;
#define NO_INTERLEAVE_INDEX (-1UL) /* use task il_prev for interleaving */
#ifdef CONFIG_NUMA
/*
* Describe a memory policy.
*
* A mempolicy can be either associated with a process or with a VMA.
* For VMA related allocations the VMA policy is preferred, otherwise
* the process policy is used. Interrupts ignore the memory policy
* of the current process.
*
* Locking policy for interleave:
* In process context there is no locking because only the process accesses
* its own state. All vma manipulation is somewhat protected by a down_read on
* mmap_lock.
*
* Freeing policy:
* Mempolicy objects are reference counted. A mempolicy will be freed when
* mpol_put() decrements the reference count to zero.
*
* Duplicating policy objects:
* mpol_dup() allocates a new mempolicy and copies the specified mempolicy
* to the new storage. The reference count of the new object is initialized
* to 1, representing the caller of mpol_dup().
*/
struct mempolicy {
atomic_t refcnt;
unsigned short mode; /* See MPOL_* above */
unsigned short flags; /* See set_mempolicy() MPOL_F_* above */
nodemask_t nodes; /* interleave/bind/perfer */
int home_node; /* Home node to use for MPOL_BIND and MPOL_PREFERRED_MANY */
union {
nodemask_t cpuset_mems_allowed; /* relative to these nodes */
nodemask_t user_nodemask; /* nodemask passed by user */
} w;
};
/*
* Support for managing mempolicy data objects (clone, copy, destroy)
* The default fast path of a NULL MPOL_DEFAULT policy is always inlined.
*/
extern void __mpol_put(struct mempolicy *pol);
static inline void mpol_put(struct mempolicy *pol)
{
if (pol)
__mpol_put(pol);
}
/*
* Does mempolicy pol need explicit unref after use?
* Currently only needed for shared policies.
*/
static inline int mpol_needs_cond_ref(struct mempolicy *pol)
{
return (pol && (pol->flags & MPOL_F_SHARED));
}
static inline void mpol_cond_put(struct mempolicy *pol)
{
if (mpol_needs_cond_ref(pol))
__mpol_put(pol);
}
extern struct mempolicy *__mpol_dup(struct mempolicy *pol);
static inline struct mempolicy *mpol_dup(struct mempolicy *pol)
{
if (pol)
pol = __mpol_dup(pol);
return pol;
}
static inline void mpol_get(struct mempolicy *pol)
{
if (pol)
atomic_inc(&pol->refcnt);
}
extern bool __mpol_equal(struct mempolicy *a, struct mempolicy *b);
static inline bool mpol_equal(struct mempolicy *a, struct mempolicy *b)
{
if (a == b)
return true;
return __mpol_equal(a, b);
}
/*
* Tree of shared policies for a shared memory region.
*/
struct shared_policy {
struct rb_root root;
rwlock_t lock;
};
struct sp_node {
struct rb_node nd;
pgoff_t start, end;
struct mempolicy *policy;
};
int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst);
void mpol_shared_policy_init(struct shared_policy *sp, struct mempolicy *mpol);
int mpol_set_shared_policy(struct shared_policy *sp,
struct vm_area_struct *vma, struct mempolicy *mpol);
void mpol_free_shared_policy(struct shared_policy *sp);
struct mempolicy *mpol_shared_policy_lookup(struct shared_policy *sp,
pgoff_t idx);
struct mempolicy *get_task_policy(struct task_struct *p);
struct mempolicy *__get_vma_policy(struct vm_area_struct *vma,
unsigned long addr, pgoff_t *ilx);
struct mempolicy *get_vma_policy(struct vm_area_struct *vma,
unsigned long addr, int order, pgoff_t *ilx);
bool vma_policy_mof(struct vm_area_struct *vma);
extern void numa_default_policy(void);
extern void numa_policy_init(void);
extern void mpol_rebind_task(struct task_struct *tsk, const nodemask_t *new);
extern void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new);
extern int huge_node(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask);
extern bool init_nodemask_of_mempolicy(nodemask_t *mask);
extern bool mempolicy_in_oom_domain(struct task_struct *tsk,
const nodemask_t *mask);
extern unsigned int mempolicy_slab_node(void);
extern enum zone_type policy_zone;
static inline void check_highest_zone(enum zone_type k)
{
if (k > policy_zone && k != ZONE_MOVABLE)
policy_zone = k;
}
int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
const nodemask_t *to, int flags);
#ifdef CONFIG_TMPFS
extern int mpol_parse_str(char *str, struct mempolicy **mpol);
#endif
extern void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol);
/* Check if a vma is migratable */
extern bool vma_migratable(struct vm_area_struct *vma);
int mpol_misplaced(struct folio *folio, struct vm_fault *vmf,
unsigned long addr);
extern void mpol_put_task_policy(struct task_struct *);
static inline bool mpol_is_preferred_many(struct mempolicy *pol)
{
return (pol->mode == MPOL_PREFERRED_MANY);
}
extern bool apply_policy_zone(struct mempolicy *policy, enum zone_type zone);
#else
struct mempolicy {};
static inline struct mempolicy *get_task_policy(struct task_struct *p)
{
return NULL;
}
static inline bool mpol_equal(struct mempolicy *a, struct mempolicy *b)
{
return true;
}
static inline void mpol_put(struct mempolicy *pol)
{
}
static inline void mpol_cond_put(struct mempolicy *pol)
{
}
static inline void mpol_get(struct mempolicy *pol)
{
}
struct shared_policy {};
static inline void mpol_shared_policy_init(struct shared_policy *sp,
struct mempolicy *mpol)
{
}
static inline void mpol_free_shared_policy(struct shared_policy *sp)
{
}
static inline struct mempolicy *
mpol_shared_policy_lookup(struct shared_policy *sp, pgoff_t idx)
{
return NULL;
}
static inline struct mempolicy *get_vma_policy(struct vm_area_struct *vma,
unsigned long addr, int order, pgoff_t *ilx)
{
*ilx = 0;
return NULL;
}
static inline int
vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
{
return 0;
}
static inline void numa_policy_init(void)
{
}
static inline void numa_default_policy(void)
{
}
static inline void mpol_rebind_task(struct task_struct *tsk,
const nodemask_t *new)
{
}
static inline void mpol_rebind_mm(struct mm_struct *mm, nodemask_t *new)
{
}
static inline int huge_node(struct vm_area_struct *vma,
unsigned long addr, gfp_t gfp_flags,
struct mempolicy **mpol, nodemask_t **nodemask)
{
*mpol = NULL;
*nodemask = NULL;
return 0;
}
static inline bool init_nodemask_of_mempolicy(nodemask_t *m)
{
return false;
}
static inline int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
const nodemask_t *to, int flags)
{
return 0;
}
static inline void check_highest_zone(int k)
{
}
#ifdef CONFIG_TMPFS
static inline int mpol_parse_str(char *str, struct mempolicy **mpol)
{
return 1; /* error */
}
#endif
static inline int mpol_misplaced(struct folio *folio,
struct vm_fault *vmf,
unsigned long address)
{
return -1; /* no node preference */
}
static inline void mpol_put_task_policy(struct task_struct *task)
{
}
static inline bool mpol_is_preferred_many(struct mempolicy *pol)
{
return false;
}
#endif /* CONFIG_NUMA */
#endif