projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f41f2ed4 MS |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* | |
| 3 | * Free some vmemmap pages of HugeTLB | |
| 4 | * | |
| 5 | * Copyright (c) 2020, Bytedance. All rights reserved. | |
| 6 | * | |
| 7 | * Author: Muchun Song <[email protected]> | |
| 8 | */ | |
| 9 | #ifndef _LINUX_HUGETLB_VMEMMAP_H | |
| 10 | #define _LINUX_HUGETLB_VMEMMAP_H | |
| 11 | #include <linux/hugetlb.h> | |
| 12 | ||
| 13 | #ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP | |
| ad2fa371 | 14 | int alloc_huge_page_vmemmap(struct hstate *h, struct page *head); |
| f41f2ed4 | 15 | void free_huge_page_vmemmap(struct hstate *h, struct page *head); |
| 77490587 | 16 | void hugetlb_vmemmap_init(struct hstate *h); |
| b65d4adb MS |
17 | |
| 18 | /* | |
| 19 | * How many vmemmap pages associated with a HugeTLB page that can be freed | |
| 20 | * to the buddy allocator. | |
| b65d4adb MS |
21 | */ |
| 22 | static inline unsigned int free_vmemmap_pages_per_hpage(struct hstate *h) | |
| 23 | { | |
| 77490587 | 24 | return h->nr_free_vmemmap_pages; |
| b65d4adb | 25 | } |
| f41f2ed4 | 26 | #else |
| ad2fa371 MS |
27 | static inline int alloc_huge_page_vmemmap(struct hstate *h, struct page *head) |
| 28 | { | |
| 29 | return 0; | |
| 30 | } | |
| 31 | ||
| f41f2ed4 MS |
32 | static inline void free_huge_page_vmemmap(struct hstate *h, struct page *head) |
| 33 | { | |
| 34 | } | |
| b65d4adb | 35 | |
| 77490587 MS |
36 | static inline void hugetlb_vmemmap_init(struct hstate *h) |
| 37 | { | |
| 38 | } | |
| 39 | ||
| b65d4adb MS |
40 | static inline unsigned int free_vmemmap_pages_per_hpage(struct hstate *h) |
| 41 | { | |
| 42 | return 0; | |
| 43 | } | |
| f41f2ed4 MS |
44 | #endif /* CONFIG_HUGETLB_PAGE_FREE_VMEMMAP */ |
| 45 | #endif /* _LINUX_HUGETLB_VMEMMAP_H */ |