Release 4.7 include/linux/hugetlb.h

Directory: include/linux
#ifndef _LINUX_HUGETLB_H

#define _LINUX_HUGETLB_H

#include <linux/mm_types.h>
#include <linux/mmdebug.h>
#include <linux/fs.h>
#include <linux/hugetlb_inline.h>
#include <linux/cgroup.h>
#include <linux/list.h>
#include <linux/kref.h>
#include <asm/pgtable.h>

struct ctl_table;
struct user_struct;
struct mmu_gather;

#ifdef CONFIG_HUGETLB_PAGE

#include <linux/mempolicy.h>
#include <linux/shm.h>
#include <asm/tlbflush.h>


struct hugepage_subpool {
	
spinlock_t lock;
	
long count;
	
long max_hpages;	/* Maximum huge pages or -1 if no maximum. */
	
long used_hpages;	/* Used count against maximum, includes */
				/* both alloced and reserved pages. */
	
struct hstate *hstate;
	
long min_hpages;	/* Minimum huge pages or -1 if no minimum. */
	
long rsv_hpages;	/* Pages reserved against global pool to */
				/* sasitfy minimum size. */
};


struct resv_map {
	
struct kref refs;
	
spinlock_t lock;
	
struct list_head regions;
	
long adds_in_progress;
	
struct list_head region_cache;
	
long region_cache_count;
};
extern struct resv_map *resv_map_alloc(void);
void resv_map_release(struct kref *ref);

extern spinlock_t hugetlb_lock;
extern int hugetlb_max_hstate __read_mostly;

#define for_each_hstate(h) \
	for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)

struct hugepage_subpool *hugepage_new_subpool(struct hstate *h, long max_hpages,
						long min_hpages);
void hugepage_put_subpool(struct hugepage_subpool *spool);

void reset_vma_resv_huge_pages(struct vm_area_struct *vma);
int hugetlb_sysctl_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_overcommit_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);
int hugetlb_treat_movable_handler(struct ctl_table *, int, void __user *, size_t *, loff_t *);

#ifdef CONFIG_NUMA
int hugetlb_mempolicy_sysctl_handler(struct ctl_table *, int,
					void __user *, size_t *, loff_t *);
#endif

int copy_hugetlb_page_range(struct mm_struct *, struct mm_struct *, struct vm_area_struct *);
long follow_hugetlb_page(struct mm_struct *, struct vm_area_struct *,
			 struct page **, struct vm_area_struct **,
			 unsigned long *, unsigned long *, long, unsigned int);
void unmap_hugepage_range(struct vm_area_struct *,
			  unsigned long, unsigned long, struct page *);
void __unmap_hugepage_range_final(struct mmu_gather *tlb,
			  struct vm_area_struct *vma,
			  unsigned long start, unsigned long end,
			  struct page *ref_page);
void __unmap_hugepage_range(struct mmu_gather *tlb, struct vm_area_struct *vma,
				unsigned long start, unsigned long end,
				struct page *ref_page);
void hugetlb_report_meminfo(struct seq_file *);
int hugetlb_report_node_meminfo(int, char *);
void hugetlb_show_meminfo(void);
unsigned long hugetlb_total_pages(void);
int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
			unsigned long address, unsigned int flags);
int hugetlb_reserve_pages(struct inode *inode, long from, long to,
						struct vm_area_struct *vma,
						vm_flags_t vm_flags);
long hugetlb_unreserve_pages(struct inode *inode, long start, long end,
						long freed);
int dequeue_hwpoisoned_huge_page(struct page *page);
bool isolate_huge_page(struct page *page, struct list_head *list);
void putback_active_hugepage(struct page *page);
void free_huge_page(struct page *page);
void hugetlb_fix_reserve_counts(struct inode *inode, bool restore_reserve);
extern struct mutex *hugetlb_fault_mutex_table;
u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm,
				struct vm_area_struct *vma,
				struct address_space *mapping,
				pgoff_t idx, unsigned long address);

pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud);

extern int hugepages_treat_as_movable;
extern int sysctl_hugetlb_shm_group;
extern struct list_head huge_boot_pages;

/* arch callbacks */

pte_t *huge_pte_alloc(struct mm_struct *mm,
			unsigned long addr, unsigned long sz);
pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr);
int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep);
struct page *follow_huge_addr(struct mm_struct *mm, unsigned long address,
			      int write);
struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
				pmd_t *pmd, int flags);
struct page *follow_huge_pud(struct mm_struct *mm, unsigned long address,
				pud_t *pud, int flags);
int pmd_huge(pmd_t pmd);
int pud_huge(pud_t pmd);
unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot);

#else /* !CONFIG_HUGETLB_PAGE */



static inline void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
{
}

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static inline unsigned long hugetlb_total_pages(void)
{
	return 0;
}

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#define follow_hugetlb_page(m,v,p,vs,a,b,i,w)	({ BUG(); 0; })

#define follow_huge_addr(mm, addr, write)	ERR_PTR(-EINVAL)

#define copy_hugetlb_page_range(src, dst, vma)	({ BUG(); 0; })


static inline void hugetlb_report_meminfo(struct seq_file *m)
{
}
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#define hugetlb_report_node_meminfo(n, buf)	0


static inline void hugetlb_show_meminfo(void)
{
}
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#define follow_huge_pmd(mm, addr, pmd, flags)	NULL

#define follow_huge_pud(mm, addr, pud, flags)	NULL

#define prepare_hugepage_range(file, addr, len)	(-EINVAL)

#define pmd_huge(x)	0

#define pud_huge(x)	0

#define is_hugepage_only_range(mm, addr, len)	0

#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })

#define hugetlb_fault(mm, vma, addr, flags)	({ BUG(); 0; })

#define huge_pte_offset(mm, address)	0


static inline int dequeue_hwpoisoned_huge_page(struct page *page)
{
	return 0;
}

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static inline bool isolate_huge_page(struct page *page, struct list_head *list)
{
	return false;
}
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#define putback_active_hugepage(p)	do {} while (0)



static inline unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
		unsigned long address, unsigned long end, pgprot_t newprot)
{
	return 0;
}

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static inline void __unmap_hugepage_range_final(struct mmu_gather *tlb,
			struct vm_area_struct *vma, unsigned long start,
			unsigned long end, struct page *ref_page)
{
	BUG();
}

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static inline void __unmap_hugepage_range(struct mmu_gather *tlb,
			struct vm_area_struct *vma, unsigned long start,
			unsigned long end, struct page *ref_page)
{
	BUG();
}

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#endif /* !CONFIG_HUGETLB_PAGE */
/*
 * hugepages at page global directory. If arch support
 * hugepages at pgd level, they need to define this.
 */
#ifndef pgd_huge

#define pgd_huge(x)	0
#endif

#ifndef pgd_write


static inline int pgd_write(pgd_t pgd)
{
	BUG();
	return 0;
}
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#endif

#ifndef pud_write


static inline int pud_write(pud_t pud)
{
	BUG();
	return 0;
}
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#endif

#ifndef is_hugepd
/*
 * Some architectures requires a hugepage directory format that is
 * required to support multiple hugepage sizes. For example
 * a4fe3ce76 "powerpc/mm: Allow more flexible layouts for hugepage pagetables"
 * introduced the same on powerpc. This allows for a more flexible hugepage
 * pagetable layout.
 */


typedef struct { unsigned long pd; } hugepd_t;

#define is_hugepd(hugepd) (0)

#define __hugepd(x) ((hugepd_t) { (x) })


static inline int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
			      unsigned pdshift, unsigned long end,
			      int write, struct page **pages, int *nr)
{
	return 0;
}
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#else
extern int gup_huge_pd(hugepd_t hugepd, unsigned long addr,
		       unsigned pdshift, unsigned long end,
		       int write, struct page **pages, int *nr);
#endif


#define HUGETLB_ANON_FILE "anon_hugepage"

enum {
	/*
         * The file will be used as an shm file so shmfs accounting rules
         * apply
         */
	
HUGETLB_SHMFS_INODE     = 1,
	/*
         * The file is being created on the internal vfs mount and shmfs
         * accounting rules do not apply
         */
	
HUGETLB_ANONHUGE_INODE  = 2,
};

#ifdef CONFIG_HUGETLBFS

struct hugetlbfs_sb_info {
	
long	max_inodes;   /* inodes allowed */
	
long	free_inodes;  /* inodes free */
	
spinlock_t	stat_lock;
	
struct hstate *hstate;
	
struct hugepage_subpool *spool;
};



static inline struct hugetlbfs_sb_info *HUGETLBFS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}

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extern const struct file_operations hugetlbfs_file_operations;
extern const struct vm_operations_struct hugetlb_vm_ops;
struct file *hugetlb_file_setup(const char *name, size_t size, vm_flags_t acct,
				struct user_struct **user, int creat_flags,
				int page_size_log);



static inline bool is_file_hugepages(struct file *file)
{
	if (file->f_op == &hugetlbfs_file_operations)
		return true;

	return is_file_shm_hugepages(file);
}


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#else /* !CONFIG_HUGETLBFS */


#define is_file_hugepages(file)			false

static inline struct file *

hugetlb_file_setup(const char *name, size_t size, vm_flags_t acctflag,
		struct user_struct **user, int creat_flags,
		int page_size_log)
{
	return ERR_PTR(-ENOSYS);
}

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#endif /* !CONFIG_HUGETLBFS */

#ifdef HAVE_ARCH_HUGETLB_UNMAPPED_AREA
unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr,
					unsigned long len, unsigned long pgoff,
					unsigned long flags);
#endif /* HAVE_ARCH_HUGETLB_UNMAPPED_AREA */

#ifdef CONFIG_HUGETLB_PAGE


#define HSTATE_NAME_LEN 32
/* Defines one hugetlb page size */

struct hstate {
	
int next_nid_to_alloc;
	
int next_nid_to_free;
	
unsigned int order;
	
unsigned long mask;
	
unsigned long max_huge_pages;
	
unsigned long nr_huge_pages;
	
unsigned long free_huge_pages;
	
unsigned long resv_huge_pages;
	
unsigned long surplus_huge_pages;
	
unsigned long nr_overcommit_huge_pages;
	
struct list_head hugepage_activelist;
	
struct list_head hugepage_freelists[MAX_NUMNODES];
	
unsigned int nr_huge_pages_node[MAX_NUMNODES];
	
unsigned int free_huge_pages_node[MAX_NUMNODES];
	
unsigned int surplus_huge_pages_node[MAX_NUMNODES];
#ifdef CONFIG_CGROUP_HUGETLB
	/* cgroup control files */
	
struct cftype cgroup_files[5];
#endif
	
char name[HSTATE_NAME_LEN];
};


struct huge_bootmem_page {
	
struct list_head list;
	
struct hstate *hstate;
#ifdef CONFIG_HIGHMEM
	
phys_addr_t phys;
#endif
};

struct page *alloc_huge_page(struct vm_area_struct *vma,
				unsigned long addr, int avoid_reserve);
struct page *alloc_huge_page_node(struct hstate *h, int nid);
struct page *alloc_huge_page_noerr(struct vm_area_struct *vma,
				unsigned long addr, int avoid_reserve);
int huge_add_to_page_cache(struct page *page, struct address_space *mapping,
			pgoff_t idx);

/* arch callback */
int __init alloc_bootmem_huge_page(struct hstate *h);

void __init hugetlb_bad_size(void);
void __init hugetlb_add_hstate(unsigned order);
struct hstate *size_to_hstate(unsigned long size);

#ifndef HUGE_MAX_HSTATE

#define HUGE_MAX_HSTATE 1
#endif

extern struct hstate hstates[HUGE_MAX_HSTATE];
extern unsigned int default_hstate_idx;


#define default_hstate (hstates[default_hstate_idx])



static inline struct hstate *hstate_inode(struct inode *i)
{
	return HUGETLBFS_SB(i->i_sb)->hstate;
}

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static inline struct hstate *hstate_file(struct file *f)
{
	return hstate_inode(file_inode(f));
}

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static inline struct hstate *hstate_sizelog(int page_size_log)
{
	if (!page_size_log)
		return &default_hstate;

	return size_to_hstate(1UL << page_size_log);
}

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static inline struct hstate *hstate_vma(struct vm_area_struct *vma)
{
	return hstate_file(vma->vm_file);
}

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static inline unsigned long huge_page_size(struct hstate *h)
{
	return (unsigned long)PAGE_SIZE << h->order;
}

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extern unsigned long vma_kernel_pagesize(struct vm_area_struct *vma);

extern unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);



static inline unsigned long huge_page_mask(struct hstate *h)
{
	return h->mask;
}

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static inline unsigned int huge_page_order(struct hstate *h)
{
	return h->order;
}

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static inline unsigned huge_page_shift(struct hstate *h)
{
	return h->order + PAGE_SHIFT;
}

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static inline bool hstate_is_gigantic(struct hstate *h)
{
	return huge_page_order(h) >= MAX_ORDER;
}

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static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1 << h->order;
}

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static inline unsigned int blocks_per_huge_page(struct hstate *h)
{
	return huge_page_size(h) / 512;
}

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#include <asm/hugetlb.h>

#ifndef arch_make_huge_pte


static inline pte_t arch_make_huge_pte(pte_t entry, struct vm_area_struct *vma,
				       struct page *page, int writable)
{
	return entry;
}
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#endif



static inline struct hstate *page_hstate(struct page *page)
{
	VM_BUG_ON_PAGE(!PageHuge(page), page);
	return size_to_hstate(PAGE_SIZE << compound_order(page));
}

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static inline unsigned hstate_index_to_shift(unsigned index)
{
	return hstates[index].order + PAGE_SHIFT;
}

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static inline int hstate_index(struct hstate *h)
{
	return h - hstates;
}

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pgoff_t __basepage_index(struct page *page);

/* Return page->index in PAGE_SIZE units */


static inline pgoff_t basepage_index(struct page *page)
{
	if (!PageCompound(page))
		return page->index;

	return __basepage_index(page);
}

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extern void dissolve_free_huge_pages(unsigned long start_pfn,
				     unsigned long end_pfn);


static inline bool hugepage_migration_supported(struct hstate *h)
{
#ifdef CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION
	return huge_page_shift(h) == PMD_SHIFT;
#else
	return false;
#endif
}

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static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
					   struct mm_struct *mm, pte_t *pte)
{
	if (huge_page_size(h) == PMD_SIZE)
		return pmd_lockptr(mm, (pmd_t *) pte);
	VM_BUG_ON(huge_page_size(h) == PAGE_SIZE);
	return &mm->page_table_lock;
}

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#ifndef hugepages_supported
/*
 * Some platform decide whether they support huge pages at boot
 * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0
 * when there is no such support
 */

#define hugepages_supported() (HPAGE_SHIFT != 0)
#endif

void hugetlb_report_usage(struct seq_file *m, struct mm_struct *mm);



static inline void hugetlb_count_add(long l, struct mm_struct *mm)
{
	atomic_long_add(l, &mm->hugetlb_usage);
}

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static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
{
	atomic_long_sub(l, &mm->hugetlb_usage);
}
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#else	/* CONFIG_HUGETLB_PAGE */

struct hstate {};

#define alloc_huge_page(v, a, r) NULL

#define alloc_huge_page_node(h, nid) NULL

#define alloc_huge_page_noerr(v, a, r) NULL

#define alloc_bootmem_huge_page(h) NULL

#define hstate_file(f) NULL

#define hstate_sizelog(s) NULL

#define hstate_vma(v) NULL

#define hstate_inode(i) NULL

#define page_hstate(page) NULL

#define huge_page_size(h) PAGE_SIZE

#define huge_page_mask(h) PAGE_MASK

#define vma_kernel_pagesize(v) PAGE_SIZE

#define vma_mmu_pagesize(v) PAGE_SIZE

#define huge_page_order(h) 0

#define huge_page_shift(h) PAGE_SHIFT


static inline unsigned int pages_per_huge_page(struct hstate *h)
{
	return 1;
}
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#define hstate_index_to_shift(index) 0

#define hstate_index(h) 0



static inline pgoff_t basepage_index(struct page *page)
{
	return page->index;
}
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#define dissolve_free_huge_pages(s, e)	do {} while (0)

#define hugepage_migration_supported(h)	false



static inline spinlock_t *huge_pte_lockptr(struct hstate *h,
					   struct mm_struct *mm, pte_t *pte)
{
	return &mm->page_table_lock;
}

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static inline void hugetlb_report_usage(struct seq_file *f, struct mm_struct *m)
{
}

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static inline void hugetlb_count_sub(long l, struct mm_struct *mm)
{
}
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Total 14 100.00% 1 100.00%

#endif	/* CONFIG_HUGETLB_PAGE */



static inline spinlock_t *huge_pte_lock(struct hstate *h,
					struct mm_struct *mm, pte_t *pte)
{
	spinlock_t *ptl;

	ptl = huge_pte_lockptr(h, mm, pte);
	spin_lock(ptl);
	return ptl;
}

Contributors
Person Tokens Prop Commits CommitProp
kirill a. shutemov kirill a. shutemov 45 100.00% 1 100.00%
Total 45 100.00% 1 100.00%

#endif /* _LINUX_HUGETLB_H */
Overall Contributors
Person Tokens Prop Commits CommitProp
andi kleen andi kleen 480 18.50% 6 5.00%
andrew morton andrew morton 371 14.30% 17 14.17%
naoya horiguchi naoya horiguchi 318 12.26% 15 12.50%
aneesh kumar aneesh kumar 273 10.52% 6 5.00%
mel gorman mel gorman 151 5.82% 7 5.83%
kirill a. shutemov kirill a. shutemov 139 5.36% 1 0.83%
mike kravetz mike kravetz 138 5.32% 7 5.83%
david gibson david gibson 77 2.97% 3 2.50%
kenneth w. chen kenneth w. chen 77 2.97% 4 3.33%
zhang yi zhang yi 58 2.24% 1 0.83%
hugh dickins hugh dickins 52 2.00% 5 4.17%
jon tollefson jon tollefson 37 1.43% 1 0.83%
joonsoo kim joonsoo kim 37 1.43% 1 0.83%
nishanth aravamudan nishanth aravamudan 34 1.31% 5 4.17%
adrian bunk adrian bunk 32 1.23% 1 0.83%
chris metcalf chris metcalf 31 1.20% 1 0.83%
yanmin zhang yanmin zhang 29 1.12% 1 0.83%
lee schermerhorn lee schermerhorn 29 1.12% 2 1.67%
eric b munson eric b munson 21 0.81% 2 1.67%
luiz fernando capitulino luiz fernando capitulino 20 0.77% 1 0.83%
peter zijlstra peter zijlstra 19 0.73% 1 0.83%
steve capper steve capper 18 0.69% 1 0.83%
adam litke adam litke 16 0.62% 2 1.67%
alexey dobriyan alexey dobriyan 15 0.58% 3 2.50%
david rientjes david rientjes 14 0.54% 1 0.83%
andrea righi andrea righi 12 0.46% 1 0.83%
dominik dingel dominik dingel 10 0.39% 1 0.83%
eric w. biederman eric w. biederman 9 0.35% 1 0.83%
atsushi kumagai atsushi kumagai 9 0.35% 1 0.83%
dave hansen dave hansen 8 0.31% 1 0.83%
becky bruce becky bruce 8 0.31% 1 0.83%
linus torvalds linus torvalds 7 0.27% 3 2.50%
vaishali thakkar vaishali thakkar 7 0.27% 1 0.83%
sasha levin sasha levin 7 0.27% 2 1.67%
kosaki motohiro kosaki motohiro 4 0.15% 1 0.83%
al viro al viro 4 0.15% 2 1.67%
yaowei bai yaowei bai 4 0.15% 1 0.83%
michel lespinasse michel lespinasse 4 0.15% 1 0.83%
chen gang chen gang 4 0.15% 2 1.67%
dan williams dan williams 3 0.12% 1 0.83%
davidlohr bueso davidlohr bueso 3 0.12% 1 0.83%
daniel mcneil daniel mcneil 2 0.08% 1 0.83%
stefan richter stefan richter 1 0.04% 1 0.83%
arjan van de ven arjan van de ven 1 0.04% 1 0.83%
andrey ryabinin andrey ryabinin 1 0.04% 1 0.83%
steven truelove steven truelove 0.00% 0 0.00%
Total 2594 100.00% 120 100.00%
  Directory: include/linux

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
mel gorman	mel gorman	11	100.00%	1	100.00%
	Total	11	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 include/linux/hugetlb.h

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