shmem.c (c845428b7a9157523103100806bc8130d64769c8) shmem.c (93893eacb372b0a4a30f7de6609b08c3ba6c4fd9)
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

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530#define SHMEM_HUGE_DENY (-1)
531#define SHMEM_HUGE_FORCE (-2)
532
533#ifdef CONFIG_TRANSPARENT_HUGEPAGE
534/* ifdef here to avoid bloating shmem.o when not necessary */
535
536static int shmem_huge __read_mostly = SHMEM_HUGE_NEVER;
537
1/*
2 * Resizable virtual memory filesystem for Linux.
3 *
4 * Copyright (C) 2000 Linus Torvalds.
5 * 2000 Transmeta Corp.
6 * 2000-2001 Christoph Rohland
7 * 2000-2001 SAP AG
8 * 2002 Red Hat Inc.

--- 521 unchanged lines hidden (view full) ---

530#define SHMEM_HUGE_DENY (-1)
531#define SHMEM_HUGE_FORCE (-2)
532
533#ifdef CONFIG_TRANSPARENT_HUGEPAGE
534/* ifdef here to avoid bloating shmem.o when not necessary */
535
536static int shmem_huge __read_mostly = SHMEM_HUGE_NEVER;
537
538bool shmem_is_huge(struct inode *inode, pgoff_t index, bool shmem_huge_force,
539 struct mm_struct *mm, unsigned long vm_flags)
538static bool __shmem_is_huge(struct inode *inode, pgoff_t index,
539 bool shmem_huge_force, struct mm_struct *mm,
540 unsigned long vm_flags)
540{
541 loff_t i_size;
542
543 if (!S_ISREG(inode->i_mode))
544 return false;
545 if (mm && ((vm_flags & VM_NOHUGEPAGE) || test_bit(MMF_DISABLE_THP, &mm->flags)))
546 return false;
547 if (shmem_huge == SHMEM_HUGE_DENY)

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562 if (mm && (vm_flags & VM_HUGEPAGE))
563 return true;
564 fallthrough;
565 default:
566 return false;
567 }
568}
569
541{
542 loff_t i_size;
543
544 if (!S_ISREG(inode->i_mode))
545 return false;
546 if (mm && ((vm_flags & VM_NOHUGEPAGE) || test_bit(MMF_DISABLE_THP, &mm->flags)))
547 return false;
548 if (shmem_huge == SHMEM_HUGE_DENY)

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563 if (mm && (vm_flags & VM_HUGEPAGE))
564 return true;
565 fallthrough;
566 default:
567 return false;
568 }
569}
570
571bool shmem_is_huge(struct inode *inode, pgoff_t index,
572 bool shmem_huge_force, struct mm_struct *mm,
573 unsigned long vm_flags)
574{
575 if (HPAGE_PMD_ORDER > MAX_PAGECACHE_ORDER)
576 return false;
577
578 return __shmem_is_huge(inode, index, shmem_huge_force, mm, vm_flags);
579}
580
570#if defined(CONFIG_SYSFS)
571static int shmem_parse_huge(const char *str)
572{
573 if (!strcmp(str, "never"))
574 return SHMEM_HUGE_NEVER;
575 if (!strcmp(str, "always"))
576 return SHMEM_HUGE_ALWAYS;
577 if (!strcmp(str, "within_size"))

--- 4366 unchanged lines hidden --- 		581#if defined(CONFIG_SYSFS)
582static int shmem_parse_huge(const char *str)
583{
584 if (!strcmp(str, "never"))
585 return SHMEM_HUGE_NEVER;
586 if (!strcmp(str, "always"))
587 return SHMEM_HUGE_ALWAYS;
588 if (!strcmp(str, "within_size"))

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