cregit-Linux how code gets into the kernel

Release 4.15 include/linux/huge_mm.h

Directory: include/linux
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_HUGE_MM_H

#define _LINUX_HUGE_MM_H

#include <linux/sched/coredump.h>

#include <linux/fs.h> /* only for vma_is_dax() */

extern int do_huge_pmd_anonymous_page(struct vm_fault *vmf);
extern int copy_huge_pmd(struct mm_struct *dst_mm, struct mm_struct *src_mm,
			 pmd_t *dst_pmd, pmd_t *src_pmd, unsigned long addr,
			 struct vm_area_struct *vma);
extern void huge_pmd_set_accessed(struct vm_fault *vmf, pmd_t orig_pmd);
extern int copy_huge_pud(struct mm_struct *dst_mm, struct mm_struct *src_mm,
			 pud_t *dst_pud, pud_t *src_pud, unsigned long addr,
			 struct vm_area_struct *vma);

#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
extern void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud);
#else

static inline void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) { }

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Matthew Wilcox14100.00%1100.00%
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#endif extern int do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd); extern struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, unsigned int flags); extern bool madvise_free_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long next); extern int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr); extern int zap_huge_pud(struct mmu_gather *tlb, struct vm_area_struct *vma, pud_t *pud, unsigned long addr); extern int mincore_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, unsigned long end, unsigned char *vec); extern bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, unsigned long new_addr, unsigned long old_end, pmd_t *old_pmd, pmd_t *new_pmd, bool *need_flush); extern int change_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, pgprot_t newprot, int prot_numa); int vmf_insert_pfn_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, pfn_t pfn, bool write); int vmf_insert_pfn_pud(struct vm_area_struct *vma, unsigned long addr, pud_t *pud, pfn_t pfn, bool write); enum transparent_hugepage_flag { TRANSPARENT_HUGEPAGE_FLAG, TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_DIRECT_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KSWAPD_OR_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_REQ_MADV_FLAG, TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG, TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG, #ifdef CONFIG_DEBUG_VM TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG, #endif }; struct kobject; struct kobj_attribute; extern ssize_t single_hugepage_flag_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count, enum transparent_hugepage_flag flag); extern ssize_t single_hugepage_flag_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf, enum transparent_hugepage_flag flag); extern struct kobj_attribute shmem_enabled_attr; #define HPAGE_PMD_ORDER (HPAGE_PMD_SHIFT-PAGE_SHIFT) #define HPAGE_PMD_NR (1<<HPAGE_PMD_ORDER) #ifdef CONFIG_TRANSPARENT_HUGEPAGE #define HPAGE_PMD_SHIFT PMD_SHIFT #define HPAGE_PMD_SIZE ((1UL) << HPAGE_PMD_SHIFT) #define HPAGE_PMD_MASK (~(HPAGE_PMD_SIZE - 1)) #define HPAGE_PUD_SHIFT PUD_SHIFT #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) extern bool is_vma_temporary_stack(struct vm_area_struct *vma); extern unsigned long transparent_hugepage_flags;
static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma) { if (vma->vm_flags & VM_NOHUGEPAGE) return false; if (is_vma_temporary_stack(vma)) return false; if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) return false; if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_FLAG)) return true; if (vma_is_dax(vma)) return true; if (transparent_hugepage_flags & (1 << TRANSPARENT_HUGEPAGE_REQ_MADV_FLAG)) return !!(vma->vm_flags & VM_HUGEPAGE); return false; }

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Dan J Williams9496.91%266.67%
Andrea Arcangeli33.09%133.33%
Total97100.00%3100.00%

#define transparent_hugepage_use_zero_page() \ (transparent_hugepage_flags & \ (1<<TRANSPARENT_HUGEPAGE_USE_ZERO_PAGE_FLAG)) #ifdef CONFIG_DEBUG_VM #define transparent_hugepage_debug_cow() \ (transparent_hugepage_flags & \ (1<<TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG)) #else /* CONFIG_DEBUG_VM */ #define transparent_hugepage_debug_cow() 0 #endif /* CONFIG_DEBUG_VM */ extern unsigned long thp_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags); extern void prep_transhuge_page(struct page *page); extern void free_transhuge_page(struct page *page); bool can_split_huge_page(struct page *page, int *pextra_pins); int split_huge_page_to_list(struct page *page, struct list_head *list);
static inline int split_huge_page(struct page *page) { return split_huge_page_to_list(page, NULL); }

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Kirill A. Shutemov1680.00%133.33%
Shaohua Li315.00%133.33%
Andrea Arcangeli15.00%133.33%
Total20100.00%3100.00%

void deferred_split_huge_page(struct page *page); void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long address, bool freeze, struct page *page); #define split_huge_pmd(__vma, __pmd, __address) \ do { \ pmd_t *____pmd = (__pmd); \ if (is_swap_pmd(*____pmd) || pmd_trans_huge(*____pmd) \ || pmd_devmap(*____pmd)) \ __split_huge_pmd(__vma, __pmd, __address, \ false, NULL); \ } while (0) void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, bool freeze, struct page *page); void __split_huge_pud(struct vm_area_struct *vma, pud_t *pud, unsigned long address); #define split_huge_pud(__vma, __pud, __address) \ do { \ pud_t *____pud = (__pud); \ if (pud_trans_huge(*____pud) \ || pud_devmap(*____pud)) \ __split_huge_pud(__vma, __pud, __address); \ } while (0) extern int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice); extern void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, long adjust_next); extern spinlock_t *__pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma); extern spinlock_t *__pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma);
static inline int is_swap_pmd(pmd_t pmd) { return !pmd_none(pmd) && !pmd_present(pmd); }

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Zi Yan23100.00%1100.00%
Total23100.00%1100.00%

/* mmap_sem must be held on entry */
static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) { VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd)) return __pmd_trans_huge_lock(pmd, vma); else return NULL; }

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Naoya Horiguchi4772.31%116.67%
Dan J Williams69.23%116.67%
Zi Yan69.23%116.67%
Sasha Levin34.62%116.67%
Kirill A. Shutemov23.08%116.67%
Chen Gang S11.54%116.67%
Total65100.00%6100.00%


static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma) { VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma); if (pud_trans_huge(*pud) || pud_devmap(*pud)) return __pud_trans_huge_lock(pud, vma); else return NULL; }

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Matthew Wilcox59100.00%1100.00%
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static inline int hpage_nr_pages(struct page *page) { if (unlikely(PageTransHuge(page))) return HPAGE_PMD_NR; return 1; }

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Rik Van Riel28100.00%1100.00%
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struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, int flags); struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, pud_t *pud, int flags); extern int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd); extern struct page *huge_zero_page;
static inline bool is_huge_zero_page(struct page *page) { return READ_ONCE(huge_zero_page) == page; }

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Yalin Wang1995.00%150.00%
Mark Rutland15.00%150.00%
Total20100.00%2100.00%


static inline bool is_huge_zero_pmd(pmd_t pmd) { return is_huge_zero_page(pmd_page(pmd)); }

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static inline bool is_huge_zero_pud(pud_t pud) { return false; }

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Matthew Wilcox13100.00%1100.00%
Total13100.00%1100.00%

struct page *mm_get_huge_zero_page(struct mm_struct *mm); void mm_put_huge_zero_page(struct mm_struct *mm); #define mk_huge_pmd(page, prot) pmd_mkhuge(mk_pmd(page, prot))
static inline bool thp_migration_supported(void) { return IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION); }

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Naoya Horiguchi15100.00%1100.00%
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#else /* CONFIG_TRANSPARENT_HUGEPAGE */ #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) #define hpage_nr_pages(x) 1
static inline bool transparent_hugepage_enabled(struct vm_area_struct *vma) { return false; }

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Dan J Williams1280.00%150.00%
Andrea Arcangeli320.00%150.00%
Total15100.00%2100.00%


static inline void prep_transhuge_page(struct page *page) {}

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Kirill A. Shutemov11100.00%1100.00%
Total11100.00%1100.00%

#define transparent_hugepage_flags 0UL #define thp_get_unmapped_area NULL
static inline bool can_split_huge_page(struct page *page, int *pextra_pins) { BUILD_BUG(); return false; }

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Huang Ying2090.91%150.00%
Shaohua Li29.09%150.00%
Total22100.00%2100.00%


static inline int split_huge_page_to_list(struct page *page, struct list_head *list) { return 0; }

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Shaohua Li1890.00%150.00%
Huang Ying210.00%150.00%
Total20100.00%2100.00%


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

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Andrea Arcangeli15100.00%1100.00%
Total15100.00%1100.00%


static inline void deferred_split_huge_page(struct page *page) {}

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Kirill A. Shutemov11100.00%1100.00%
Total11100.00%1100.00%

#define split_huge_pmd(__vma, __pmd, __address) \ do { } while (0)
static inline void __split_huge_pmd(struct vm_area_struct *vma, pmd_t *pmd, unsigned long address, bool freeze, struct page *page) {}

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David Rientjes27100.00%1100.00%
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static inline void split_huge_pmd_address(struct vm_area_struct *vma, unsigned long address, bool freeze, struct page *page) {}

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Kirill A. Shutemov23100.00%2100.00%
Total23100.00%2100.00%

#define split_huge_pud(__vma, __pmd, __address) \ do { } while (0)
static inline int hugepage_madvise(struct vm_area_struct *vma, unsigned long *vm_flags, int advice) { BUG(); return 0; }

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Andrea Arcangeli26100.00%3100.00%
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static inline void vma_adjust_trans_huge(struct vm_area_struct *vma, unsigned long start, unsigned long end, long adjust_next) { }

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Andrea Arcangeli22100.00%1100.00%
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static inline int is_swap_pmd(pmd_t pmd) { return 0; }

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Zi Yan13100.00%1100.00%
Total13100.00%1100.00%


static inline spinlock_t *pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma) { return NULL; }

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Naoya Horiguchi1785.00%150.00%
Kirill A. Shutemov315.00%150.00%
Total20100.00%2100.00%


static inline spinlock_t *pud_trans_huge_lock(pud_t *pud, struct vm_area_struct *vma) { return NULL; }

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Matthew Wilcox20100.00%1100.00%
Total20100.00%1100.00%


static inline int do_huge_pmd_numa_page(struct vm_fault *vmf, pmd_t orig_pmd) { return 0; }

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Mel Gorman1583.33%250.00%
Jan Kara211.11%125.00%
Kirill A. Shutemov15.56%125.00%
Total18100.00%4100.00%


static inline bool is_huge_zero_page(struct page *page) { return false; }

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Yalin Wang15100.00%1100.00%
Total15100.00%1100.00%


static inline bool is_huge_zero_pud(pud_t pud) { return false; }

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Matthew Wilcox13100.00%1100.00%
Total13100.00%1100.00%


static inline void mm_put_huge_zero_page(struct mm_struct *mm) { return; }

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Kirill A. Shutemov753.85%150.00%
Aaron Lu646.15%150.00%
Total13100.00%2100.00%


static inline struct page *follow_devmap_pmd(struct vm_area_struct *vma, unsigned long addr, pmd_t *pmd, int flags) { return NULL; }

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Dan J Williams28100.00%1100.00%
Total28100.00%1100.00%


static inline struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, pud_t *pud, int flags) { return NULL; }

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Matthew Wilcox28100.00%1100.00%
Total28100.00%1100.00%


static inline bool thp_migration_supported(void) { return false; }

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Naoya Horiguchi12100.00%1100.00%
Total12100.00%1100.00%

#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif /* _LINUX_HUGE_MM_H */

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Matthew Wilcox41624.82%34.69%
Andrea Arcangeli31618.85%710.94%
Kirill A. Shutemov25715.33%1726.56%
Dan J Williams1539.13%57.81%
Naoya Horiguchi1217.22%46.25%
Johannes Weiner472.80%23.12%
Zi Yan432.57%11.56%
Yalin Wang402.39%11.56%
Huang Ying362.15%23.12%
Rik Van Riel352.09%11.56%
David Rientjes311.85%34.69%
Toshi Kani311.85%11.56%
Mel Gorman311.85%46.25%
MinChan Kim271.61%11.56%
Shaohua Li261.55%11.56%
Aaron Lu201.19%23.12%
Will Deacon110.66%11.56%
Alex Shi100.60%11.56%
Jan Kara100.60%11.56%
Aneesh Kumar K.V50.30%11.56%
David Shaohua Li40.24%11.56%
Sasha Levin30.18%11.56%
Chen Gang S10.06%11.56%
Mark Rutland10.06%11.56%
Greg Kroah-Hartman10.06%11.56%
Total1676100.00%64100.00%
Directory: include/linux
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