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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _MM_PAGE_REPORTING_H | |
3 | #define _MM_PAGE_REPORTING_H | |
4 | ||
5 | #include <linux/mmzone.h> | |
6 | #include <linux/pageblock-flags.h> | |
7 | #include <linux/page-isolation.h> | |
8 | #include <linux/jump_label.h> | |
9 | #include <linux/slab.h> | |
ca5999fd | 10 | #include <linux/pgtable.h> |
36e66c55 AD |
11 | #include <linux/scatterlist.h> |
12 | ||
13 | #define PAGE_REPORTING_MIN_ORDER pageblock_order | |
14 | ||
15 | #ifdef CONFIG_PAGE_REPORTING | |
16 | DECLARE_STATIC_KEY_FALSE(page_reporting_enabled); | |
17 | void __page_reporting_notify(void); | |
18 | ||
19 | static inline bool page_reported(struct page *page) | |
20 | { | |
21 | return static_branch_unlikely(&page_reporting_enabled) && | |
22 | PageReported(page); | |
23 | } | |
24 | ||
25 | /** | |
26 | * page_reporting_notify_free - Free page notification to start page processing | |
27 | * | |
28 | * This function is meant to act as a screener for __page_reporting_notify | |
29 | * which will determine if a give zone has crossed over the high-water mark | |
30 | * that will justify us beginning page treatment. If we have crossed that | |
31 | * threshold then it will start the process of pulling some pages and | |
32 | * placing them in the batch list for treatment. | |
33 | */ | |
34 | static inline void page_reporting_notify_free(unsigned int order) | |
35 | { | |
36 | /* Called from hot path in __free_one_page() */ | |
37 | if (!static_branch_unlikely(&page_reporting_enabled)) | |
38 | return; | |
39 | ||
40 | /* Determine if we have crossed reporting threshold */ | |
41 | if (order < PAGE_REPORTING_MIN_ORDER) | |
42 | return; | |
43 | ||
44 | /* This will add a few cycles, but should be called infrequently */ | |
45 | __page_reporting_notify(); | |
46 | } | |
47 | #else /* CONFIG_PAGE_REPORTING */ | |
48 | #define page_reported(_page) false | |
49 | ||
50 | static inline void page_reporting_notify_free(unsigned int order) | |
51 | { | |
52 | } | |
53 | #endif /* CONFIG_PAGE_REPORTING */ | |
54 | #endif /*_MM_PAGE_REPORTING_H */ |