shmem.c (fdbdfefbabefcdf3f57560163b43fdc4cf95eb2f) shmem.c (3b33719c9b741066f7d2bc6036409752f8e0478d)
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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3970 shmem_huge = huge;
3971 if (shmem_huge < SHMEM_HUGE_DENY)
3972 SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge;
3973 return count;
3974}
3975
3976struct kobj_attribute shmem_enabled_attr =
3977 __ATTR(shmem_enabled, 0644, shmem_enabled_show, shmem_enabled_store);
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.

--- 3961 unchanged lines hidden (view full) ---

3970 shmem_huge = huge;
3971 if (shmem_huge < SHMEM_HUGE_DENY)
3972 SHMEM_SB(shm_mnt->mnt_sb)->huge = shmem_huge;
3973 return count;
3974}
3975
3976struct kobj_attribute shmem_enabled_attr =
3977 __ATTR(shmem_enabled, 0644, shmem_enabled_show, shmem_enabled_store);
3978#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE && CONFIG_SYSFS */
3978
3979
3980#ifdef CONFIG_TRANSPARENT_HUGE_PAGECACHE
3979bool shmem_huge_enabled(struct vm_area_struct *vma)
3980{
3981 struct inode *inode = file_inode(vma->vm_file);
3982 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
3983 loff_t i_size;
3984 pgoff_t off;
3985
3986 if (shmem_huge == SHMEM_HUGE_FORCE)

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4001 case SHMEM_HUGE_ADVISE:
4002 /* TODO: implement fadvise() hints */
4003 return (vma->vm_flags & VM_HUGEPAGE);
4004 default:
4005 VM_BUG_ON(1);
4006 return false;
4007 }
4008}
3981bool shmem_huge_enabled(struct vm_area_struct *vma)
3982{
3983 struct inode *inode = file_inode(vma->vm_file);
3984 struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
3985 loff_t i_size;
3986 pgoff_t off;
3987
3988 if (shmem_huge == SHMEM_HUGE_FORCE)

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4003 case SHMEM_HUGE_ADVISE:
4004 /* TODO: implement fadvise() hints */
4005 return (vma->vm_flags & VM_HUGEPAGE);
4006 default:
4007 VM_BUG_ON(1);
4008 return false;
4009 }
4010}
4009#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE && CONFIG_SYSFS */
4011#endif /* CONFIG_TRANSPARENT_HUGE_PAGECACHE */
4010
4011#else /* !CONFIG_SHMEM */
4012
4013/*
4014 * tiny-shmem: simple shmemfs and tmpfs using ramfs code
4015 *
4016 * This is intended for small system where the benefits of the full
4017 * shmem code (swap-backed and resource-limited) are outweighed by

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4013#else /* !CONFIG_SHMEM */
4014
4015/*
4016 * tiny-shmem: simple shmemfs and tmpfs using ramfs code
4017 *
4018 * This is intended for small system where the benefits of the full
4019 * shmem code (swap-backed and resource-limited) are outweighed by

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