Release 4.18 include/linux/page_counter.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PAGE_COUNTER_H
#define _LINUX_PAGE_COUNTER_H
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <asm/page.h>
struct page_counter {
atomic_long_t usage;
unsigned long min;
unsigned long low;
unsigned long max;
struct page_counter *parent;
/* effective memory.min and memory.min usage tracking */
unsigned long emin;
atomic_long_t min_usage;
atomic_long_t children_min_usage;
/* effective memory.low and memory.low usage tracking */
unsigned long elow;
atomic_long_t low_usage;
atomic_long_t children_low_usage;
/* legacy */
unsigned long watermark;
unsigned long failcnt;
};
#if BITS_PER_LONG == 32
#define PAGE_COUNTER_MAX LONG_MAX
#else
#define PAGE_COUNTER_MAX (LONG_MAX / PAGE_SIZE)
#endif
static inline void page_counter_init(struct page_counter *counter,
struct page_counter *parent)
{
atomic_long_set(&counter->usage, 0);
counter->max = PAGE_COUNTER_MAX;
counter->parent = parent;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Johannes Weiner | 37 | 94.87% | 1 | 50.00% |
| Roman Gushchin | 2 | 5.13% | 1 | 50.00% |
| Total | 39 | 100.00% | 2 | 100.00% |
static inline unsigned long page_counter_read(struct page_counter *counter)
{
return atomic_long_read(&counter->usage);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Johannes Weiner | 21 | 95.45% | 1 | 50.00% |
| Roman Gushchin | 1 | 4.55% | 1 | 50.00% |
| Total | 22 | 100.00% | 2 | 100.00% |
void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages);
void page_counter_charge(struct page_counter *counter, unsigned long nr_pages);
bool page_counter_try_charge(struct page_counter *counter,
unsigned long nr_pages,
struct page_counter **fail);
void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages);
void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages);
int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages);
int page_counter_memparse(const char *buf, const char *max,
unsigned long *nr_pages);
static inline void page_counter_reset_watermark(struct page_counter *counter)
{
counter->watermark = page_counter_read(counter);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Johannes Weiner | 21 | 100.00% | 1 | 100.00% |
| Total | 21 | 100.00% | 1 | 100.00% |
#endif /* _LINUX_PAGE_COUNTER_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Johannes Weiner | 225 | 77.59% | 4 | 50.00% |
| Roman Gushchin | 64 | 22.07% | 3 | 37.50% |
| Greg Kroah-Hartman | 1 | 0.34% | 1 | 12.50% |
| Total | 290 | 100.00% | 8 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.