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