blob: 2c385dd4ddbd58b3a90aa3c96b499a446f2ec987 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _MM_PAGE_REPORTING_H
#define _MM_PAGE_REPORTING_H
#include <linux/mmzone.h>
#include <linux/pageblock-flags.h>
#include <linux/page-isolation.h>
#include <linux/jump_label.h>
#include <linux/slab.h>
#include <linux/pgtable.h>
#include <linux/scatterlist.h>
#define PAGE_REPORTING_MIN_ORDER pageblock_order
#ifdef CONFIG_PAGE_REPORTING
DECLARE_STATIC_KEY_FALSE(page_reporting_enabled);
void __page_reporting_notify(void);
static inline bool page_reported(struct page *page)
{
return static_branch_unlikely(&page_reporting_enabled) &&
PageReported(page);
}
/**
* page_reporting_notify_free - Free page notification to start page processing
*
* This function is meant to act as a screener for __page_reporting_notify
* which will determine if a give zone has crossed over the high-water mark
* that will justify us beginning page treatment. If we have crossed that
* threshold then it will start the process of pulling some pages and
* placing them in the batch list for treatment.
*/
static inline void page_reporting_notify_free(unsigned int order)
{
/* Called from hot path in __free_one_page() */
if (!static_branch_unlikely(&page_reporting_enabled))
return;
/* Determine if we have crossed reporting threshold */
if (order < PAGE_REPORTING_MIN_ORDER)
return;
/* This will add a few cycles, but should be called infrequently */
__page_reporting_notify();
}
#else /* CONFIG_PAGE_REPORTING */
#define page_reported(_page) false
static inline void page_reporting_notify_free(unsigned int order)
{
}
#endif /* CONFIG_PAGE_REPORTING */
#endif /*_MM_PAGE_REPORTING_H */
|