diff options
Diffstat (limited to 'include/linux/mempolicy.h')
| -rw-r--r-- | include/linux/mempolicy.h | 118 |
1 files changed, 56 insertions, 62 deletions
diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h index 5228c62af416..0fe96f3ab3ef 100644 --- a/include/linux/mempolicy.h +++ b/include/linux/mempolicy.h @@ -6,18 +6,20 @@ #ifndef _LINUX_MEMPOLICY_H #define _LINUX_MEMPOLICY_H 1 - +#include <linux/sched.h> #include <linux/mmzone.h> -#include <linux/dax.h> #include <linux/slab.h> #include <linux/rbtree.h> #include <linux/spinlock.h> +#include <linux/node.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 /* @@ -28,10 +30,10 @@ struct mm_struct; * the process policy is used. Interrupts ignore the memory policy * of the current process. * - * Locking policy for interlave: + * 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_sem. + * mmap_lock. * * Freeing policy: * Mempolicy objects are reference counted. A mempolicy will be freed when @@ -46,11 +48,9 @@ struct mempolicy { atomic_t refcnt; unsigned short mode; /* See MPOL_* above */ unsigned short flags; /* See set_mempolicy() MPOL_F_* above */ - union { - short preferred_node; /* preferred */ - nodemask_t nodes; /* interleave/bind */ - /* undefined for default */ - } v; + nodemask_t nodes; /* interleave/bind/preferred/etc */ + 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 */ @@ -92,8 +92,6 @@ static inline struct mempolicy *mpol_dup(struct mempolicy *pol) return pol; } -#define vma_policy(vma) ((vma)->vm_policy) - static inline void mpol_get(struct mempolicy *pol) { if (pol) @@ -110,35 +108,30 @@ static inline bool mpol_equal(struct mempolicy *a, struct mempolicy *b) /* * Tree of shared policies for a shared memory region. - * Maintain the policies in a pseudo mm that contains vmas. The vmas - * carry the policy. As a special twist the pseudo mm is indexed in pages, not - * bytes, so that we can work with shared memory segments bigger than - * unsigned long. */ - -struct sp_node { - struct rb_node nd; - unsigned long start, end; - struct mempolicy *policy; -}; - 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 *info, - struct vm_area_struct *vma, - struct mempolicy *new); -void mpol_free_shared_policy(struct shared_policy *p); +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, - unsigned long idx); + 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); + 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); @@ -150,7 +143,7 @@ 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_nodemask_intersects(struct task_struct *tsk, +extern bool mempolicy_in_oom_domain(struct task_struct *tsk, const nodemask_t *mask); extern unsigned int mempolicy_slab_node(void); @@ -173,48 +166,37 @@ extern int mpol_parse_str(char *str, struct mempolicy **mpol); extern void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol); /* Check if a vma is migratable */ -static inline bool vma_migratable(struct vm_area_struct *vma) -{ - if (vma->vm_flags & (VM_IO | VM_PFNMAP)) - return false; - - /* - * DAX device mappings require predictable access latency, so avoid - * incurring periodic faults. - */ - if (vma_is_dax(vma)) - return false; - -#ifndef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION - if (vma->vm_flags & VM_HUGETLB) - return false; -#endif +extern bool vma_migratable(struct vm_area_struct *vma); - /* - * Migration allocates pages in the highest zone. If we cannot - * do so then migration (at least from node to node) is not - * possible. - */ - if (vma->vm_file && - gfp_zone(mapping_gfp_mask(vma->vm_file->f_mapping)) - < policy_zone) - return false; - return true; +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 int mpol_misplaced(struct page *, struct vm_area_struct *, unsigned long); -extern void mpol_put_task_policy(struct task_struct *); +extern bool apply_policy_zone(struct mempolicy *policy, enum zone_type zone); + +extern int mempolicy_set_node_perf(unsigned int node, + struct access_coordinate *coords); #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 *p) +static inline void mpol_put(struct mempolicy *pol) { } @@ -233,17 +215,22 @@ static inline void mpol_shared_policy_init(struct shared_policy *sp, { } -static inline void mpol_free_shared_policy(struct shared_policy *p) +static inline void mpol_free_shared_policy(struct shared_policy *sp) { } static inline struct mempolicy * -mpol_shared_policy_lookup(struct shared_policy *sp, unsigned long idx) +mpol_shared_policy_lookup(struct shared_policy *sp, pgoff_t idx) { return NULL; } -#define vma_policy(vma) 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) @@ -299,7 +286,8 @@ static inline int mpol_parse_str(char *str, struct mempolicy **mpol) } #endif -static inline int mpol_misplaced(struct page *page, struct vm_area_struct *vma, +static inline int mpol_misplaced(struct folio *folio, + struct vm_fault *vmf, unsigned long address) { return -1; /* no node preference */ @@ -308,5 +296,11 @@ static inline int mpol_misplaced(struct page *page, struct vm_area_struct *vma, 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 |