linux/mm/show_mem.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Generic show_mem() implementation
 *
 * Copyright (C) 2008 Johannes Weiner <[email protected]>
 */

#include <linux/blkdev.h>
#include <linux/cma.h>
#include <linux/cpuset.h>
#include <linux/highmem.h>
#include <linux/hugetlb.h>
#include <linux/mm.h>
#include <linux/mmzone.h>
#include <linux/swap.h>
#include <linux/vmstat.h>

#include "internal.h"
#include "swap.h"

atomic_long_t _totalram_pages __read_mostly;
EXPORT_SYMBOL(…);
unsigned long totalreserve_pages __read_mostly;
unsigned long totalcma_pages __read_mostly;

static inline void show_node(struct zone *zone)
{ … }

long si_mem_available(void)
{ … }
EXPORT_SYMBOL_GPL(…);

void si_meminfo(struct sysinfo *val)
{ … }

EXPORT_SYMBOL(…);

#ifdef CONFIG_NUMA
void si_meminfo_node(struct sysinfo *val, int nid)
{ … }
#endif

/*
 * Determine whether the node should be displayed or not, depending on whether
 * SHOW_MEM_FILTER_NODES was passed to show_free_areas().
 */
static bool show_mem_node_skip(unsigned int flags, int nid, nodemask_t *nodemask)
{ … }

static void show_migration_types(unsigned char type)
{ … }

static bool node_has_managed_zones(pg_data_t *pgdat, int max_zone_idx)
{ … }

/*
 * Show free area list (used inside shift_scroll-lock stuff)
 * We also calculate the percentage fragmentation. We do this by counting the
 * memory on each free list with the exception of the first item on the list.
 *
 * Bits in @filter:
 * SHOW_MEM_FILTER_NODES: suppress nodes that are not allowed by current's
 *   cpuset.
 */
static void show_free_areas(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
{ … }

void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
{ … }