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Muchun Song
47010c040d
The word of "free" is not expressive enough to express the feature of optimizing vmemmap pages associated with each HugeTLB, rename this keywork to "optimize". In this patch , cheanup configs to make code more expressive. Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Muchun Song <[email protected]> Cc: Mike Kravetz <[email protected]> Cc: David Hildenbrand <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Optimize vmemmap pages associated with HugeTLB
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*
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* Copyright (c) 2020, Bytedance. All rights reserved.
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*
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* Author: Muchun Song <[email protected]>
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*/
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#ifndef _LINUX_HUGETLB_VMEMMAP_H
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#define _LINUX_HUGETLB_VMEMMAP_H
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#include <linux/hugetlb.h>
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#ifdef CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
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int hugetlb_vmemmap_alloc(struct hstate *h, struct page *head);
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void hugetlb_vmemmap_free(struct hstate *h, struct page *head);
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void hugetlb_vmemmap_init(struct hstate *h);
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/*
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* How many vmemmap pages associated with a HugeTLB page that can be
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* optimized and freed to the buddy allocator.
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*/
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static inline unsigned int hugetlb_optimize_vmemmap_pages(struct hstate *h)
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{
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return h->optimize_vmemmap_pages;
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}
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#else
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static inline int hugetlb_vmemmap_alloc(struct hstate *h, struct page *head)
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{
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return 0;
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}
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static inline void hugetlb_vmemmap_free(struct hstate *h, struct page *head)
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{
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}
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static inline void hugetlb_vmemmap_init(struct hstate *h)
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{
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}
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static inline unsigned int hugetlb_optimize_vmemmap_pages(struct hstate *h)
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{
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return 0;
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}
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#endif /* CONFIG_HUGETLB_PAGE_OPTIMIZE_VMEMMAP */
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#endif /* _LINUX_HUGETLB_VMEMMAP_H */
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