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