diff options
Diffstat (limited to 'fs/hugetlbfs')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 109 |
1 files changed, 60 insertions, 49 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index c98d0665fa5..78bde32ea95 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -151,8 +151,8 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, { struct mm_struct *mm = current->mm; struct vm_area_struct *vma; - unsigned long start_addr; struct hstate *h = hstate_file(file); + struct vm_unmapped_area_info info; if (len & ~huge_page_mask(h)) return -EINVAL; @@ -173,39 +173,13 @@ hugetlb_get_unmapped_area(struct file *file, unsigned long addr, return addr; } - if (len > mm->cached_hole_size) - start_addr = mm->free_area_cache; - else { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - } - -full_search: - addr = ALIGN(start_addr, huge_page_size(h)); - - for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { - /* At this point: (!vma || addr < vma->vm_end). */ - if (TASK_SIZE - len < addr) { - /* - * Start a new search - just in case we missed - * some holes. - */ - if (start_addr != TASK_UNMAPPED_BASE) { - start_addr = TASK_UNMAPPED_BASE; - mm->cached_hole_size = 0; - goto full_search; - } - return -ENOMEM; - } - - if (!vma || addr + len <= vma->vm_start) { - mm->free_area_cache = addr + len; - return addr; - } - if (addr + mm->cached_hole_size < vma->vm_start) - mm->cached_hole_size = vma->vm_start - addr; - addr = ALIGN(vma->vm_end, huge_page_size(h)); - } + info.flags = 0; + info.length = len; + info.low_limit = TASK_UNMAPPED_BASE; + info.high_limit = TASK_SIZE; + info.align_mask = PAGE_MASK & ~huge_page_mask(h); + info.align_offset = 0; + return vm_unmapped_area(&info); } #endif @@ -608,11 +582,11 @@ static int hugetlbfs_migrate_page(struct address_space *mapping, int rc; rc = migrate_huge_page_move_mapping(mapping, newpage, page); - if (rc) + if (rc != MIGRATEPAGE_SUCCESS) return rc; migrate_page_copy(newpage, page); - return 0; + return MIGRATEPAGE_SUCCESS; } static int hugetlbfs_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -923,7 +897,7 @@ static struct file_system_type hugetlbfs_fs_type = { .kill_sb = kill_litter_super, }; -static struct vfsmount *hugetlbfs_vfsmount; +static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE]; static int can_do_hugetlb_shm(void) { @@ -932,9 +906,22 @@ static int can_do_hugetlb_shm(void) return capable(CAP_IPC_LOCK) || in_group_p(shm_group); } +static int get_hstate_idx(int page_size_log) +{ + struct hstate *h; + + if (!page_size_log) + return default_hstate_idx; + h = size_to_hstate(1 << page_size_log); + if (!h) + return -1; + return h - hstates; +} + struct file *hugetlb_file_setup(const char *name, unsigned long addr, size_t size, vm_flags_t acctflag, - struct user_struct **user, int creat_flags) + struct user_struct **user, + int creat_flags, int page_size_log) { int error = -ENOMEM; struct file *file; @@ -944,9 +931,14 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, struct qstr quick_string; struct hstate *hstate; unsigned long num_pages; + int hstate_idx; + + hstate_idx = get_hstate_idx(page_size_log); + if (hstate_idx < 0) + return ERR_PTR(-ENODEV); *user = NULL; - if (!hugetlbfs_vfsmount) + if (!hugetlbfs_vfsmount[hstate_idx]) return ERR_PTR(-ENOENT); if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) { @@ -963,7 +955,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, } } - root = hugetlbfs_vfsmount->mnt_root; + root = hugetlbfs_vfsmount[hstate_idx]->mnt_root; quick_string.name = name; quick_string.len = strlen(quick_string.name); quick_string.hash = 0; @@ -971,7 +963,7 @@ struct file *hugetlb_file_setup(const char *name, unsigned long addr, if (!path.dentry) goto out_shm_unlock; - path.mnt = mntget(hugetlbfs_vfsmount); + path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]); error = -ENOSPC; inode = hugetlbfs_get_inode(root->d_sb, NULL, S_IFREG | S_IRWXUGO, 0); if (!inode) @@ -1011,8 +1003,9 @@ out_shm_unlock: static int __init init_hugetlbfs_fs(void) { + struct hstate *h; int error; - struct vfsmount *vfsmount; + int i; error = bdi_init(&hugetlbfs_backing_dev_info); if (error) @@ -1029,14 +1022,26 @@ static int __init init_hugetlbfs_fs(void) if (error) goto out; - vfsmount = kern_mount(&hugetlbfs_fs_type); + i = 0; + for_each_hstate(h) { + char buf[50]; + unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10); - if (!IS_ERR(vfsmount)) { - hugetlbfs_vfsmount = vfsmount; - return 0; - } + snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb); + hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type, + buf); - error = PTR_ERR(vfsmount); + if (IS_ERR(hugetlbfs_vfsmount[i])) { + pr_err("hugetlb: Cannot mount internal hugetlbfs for " + "page size %uK", ps_kb); + error = PTR_ERR(hugetlbfs_vfsmount[i]); + hugetlbfs_vfsmount[i] = NULL; + } + i++; + } + /* Non default hstates are optional */ + if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx])) + return 0; out: kmem_cache_destroy(hugetlbfs_inode_cachep); @@ -1047,13 +1052,19 @@ static int __init init_hugetlbfs_fs(void) static void __exit exit_hugetlbfs_fs(void) { + struct hstate *h; + int i; + + /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); kmem_cache_destroy(hugetlbfs_inode_cachep); - kern_unmount(hugetlbfs_vfsmount); + i = 0; + for_each_hstate(h) + kern_unmount(hugetlbfs_vfsmount[i++]); unregister_filesystem(&hugetlbfs_fs_type); bdi_destroy(&hugetlbfs_backing_dev_info); } |