431 lines
12 KiB
C
431 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Generic show_mem() implementation
|
|
*
|
|
* Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
|
|
*/
|
|
|
|
#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(_totalram_pages);
|
|
unsigned long totalreserve_pages __read_mostly;
|
|
unsigned long totalcma_pages __read_mostly;
|
|
|
|
static inline void show_node(struct zone *zone)
|
|
{
|
|
if (IS_ENABLED(CONFIG_NUMA))
|
|
printk("Node %d ", zone_to_nid(zone));
|
|
}
|
|
|
|
long si_mem_available(void)
|
|
{
|
|
long available;
|
|
unsigned long pagecache;
|
|
unsigned long wmark_low = 0;
|
|
unsigned long pages[NR_LRU_LISTS];
|
|
unsigned long reclaimable;
|
|
struct zone *zone;
|
|
int lru;
|
|
|
|
for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
|
|
pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
|
|
|
|
for_each_zone(zone)
|
|
wmark_low += low_wmark_pages(zone);
|
|
|
|
/*
|
|
* Estimate the amount of memory available for userspace allocations,
|
|
* without causing swapping or OOM.
|
|
*/
|
|
available = global_zone_page_state(NR_FREE_PAGES) - totalreserve_pages;
|
|
|
|
/*
|
|
* Not all the page cache can be freed, otherwise the system will
|
|
* start swapping or thrashing. Assume at least half of the page
|
|
* cache, or the low watermark worth of cache, needs to stay.
|
|
*/
|
|
pagecache = pages[LRU_ACTIVE_FILE] + pages[LRU_INACTIVE_FILE];
|
|
pagecache -= min(pagecache / 2, wmark_low);
|
|
available += pagecache;
|
|
|
|
/*
|
|
* Part of the reclaimable slab and other kernel memory consists of
|
|
* items that are in use, and cannot be freed. Cap this estimate at the
|
|
* low watermark.
|
|
*/
|
|
reclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B) +
|
|
global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE);
|
|
available += reclaimable - min(reclaimable / 2, wmark_low);
|
|
|
|
if (available < 0)
|
|
available = 0;
|
|
return available;
|
|
}
|
|
EXPORT_SYMBOL_GPL(si_mem_available);
|
|
|
|
void si_meminfo(struct sysinfo *val)
|
|
{
|
|
val->totalram = totalram_pages();
|
|
val->sharedram = global_node_page_state(NR_SHMEM);
|
|
val->freeram = global_zone_page_state(NR_FREE_PAGES);
|
|
val->bufferram = nr_blockdev_pages();
|
|
val->totalhigh = totalhigh_pages();
|
|
val->freehigh = nr_free_highpages();
|
|
val->mem_unit = PAGE_SIZE;
|
|
}
|
|
|
|
EXPORT_SYMBOL(si_meminfo);
|
|
|
|
#ifdef CONFIG_NUMA
|
|
void si_meminfo_node(struct sysinfo *val, int nid)
|
|
{
|
|
int zone_type; /* needs to be signed */
|
|
unsigned long managed_pages = 0;
|
|
unsigned long managed_highpages = 0;
|
|
unsigned long free_highpages = 0;
|
|
pg_data_t *pgdat = NODE_DATA(nid);
|
|
|
|
for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++)
|
|
managed_pages += zone_managed_pages(&pgdat->node_zones[zone_type]);
|
|
val->totalram = managed_pages;
|
|
val->sharedram = node_page_state(pgdat, NR_SHMEM);
|
|
val->freeram = sum_zone_node_page_state(nid, NR_FREE_PAGES);
|
|
#ifdef CONFIG_HIGHMEM
|
|
for (zone_type = 0; zone_type < MAX_NR_ZONES; zone_type++) {
|
|
struct zone *zone = &pgdat->node_zones[zone_type];
|
|
|
|
if (is_highmem(zone)) {
|
|
managed_highpages += zone_managed_pages(zone);
|
|
free_highpages += zone_page_state(zone, NR_FREE_PAGES);
|
|
}
|
|
}
|
|
val->totalhigh = managed_highpages;
|
|
val->freehigh = free_highpages;
|
|
#else
|
|
val->totalhigh = managed_highpages;
|
|
val->freehigh = free_highpages;
|
|
#endif
|
|
val->mem_unit = PAGE_SIZE;
|
|
}
|
|
#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)
|
|
{
|
|
if (!(flags & SHOW_MEM_FILTER_NODES))
|
|
return false;
|
|
|
|
/*
|
|
* no node mask - aka implicit memory numa policy. Do not bother with
|
|
* the synchronization - read_mems_allowed_begin - because we do not
|
|
* have to be precise here.
|
|
*/
|
|
if (!nodemask)
|
|
nodemask = &cpuset_current_mems_allowed;
|
|
|
|
return !node_isset(nid, *nodemask);
|
|
}
|
|
|
|
static void show_migration_types(unsigned char type)
|
|
{
|
|
static const char types[MIGRATE_TYPES] = {
|
|
[MIGRATE_UNMOVABLE] = 'U',
|
|
[MIGRATE_MOVABLE] = 'M',
|
|
[MIGRATE_RECLAIMABLE] = 'E',
|
|
[MIGRATE_HIGHATOMIC] = 'H',
|
|
#ifdef CONFIG_CMA
|
|
[MIGRATE_CMA] = 'C',
|
|
#endif
|
|
#ifdef CONFIG_MEMORY_ISOLATION
|
|
[MIGRATE_ISOLATE] = 'I',
|
|
#endif
|
|
};
|
|
char tmp[MIGRATE_TYPES + 1];
|
|
char *p = tmp;
|
|
int i;
|
|
|
|
for (i = 0; i < MIGRATE_TYPES; i++) {
|
|
if (type & (1 << i))
|
|
*p++ = types[i];
|
|
}
|
|
|
|
*p = '\0';
|
|
printk(KERN_CONT "(%s) ", tmp);
|
|
}
|
|
|
|
static bool node_has_managed_zones(pg_data_t *pgdat, int max_zone_idx)
|
|
{
|
|
int zone_idx;
|
|
for (zone_idx = 0; zone_idx <= max_zone_idx; zone_idx++)
|
|
if (zone_managed_pages(pgdat->node_zones + zone_idx))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
unsigned long free_pcp = 0;
|
|
int cpu, nid;
|
|
struct zone *zone;
|
|
pg_data_t *pgdat;
|
|
|
|
for_each_populated_zone(zone) {
|
|
if (zone_idx(zone) > max_zone_idx)
|
|
continue;
|
|
if (show_mem_node_skip(filter, zone_to_nid(zone), nodemask))
|
|
continue;
|
|
|
|
for_each_online_cpu(cpu)
|
|
free_pcp += per_cpu_ptr(zone->per_cpu_pageset, cpu)->count;
|
|
}
|
|
|
|
printk("active_anon:%lu inactive_anon:%lu isolated_anon:%lu\n"
|
|
" active_file:%lu inactive_file:%lu isolated_file:%lu\n"
|
|
" unevictable:%lu dirty:%lu writeback:%lu\n"
|
|
" slab_reclaimable:%lu slab_unreclaimable:%lu\n"
|
|
" mapped:%lu shmem:%lu pagetables:%lu\n"
|
|
" sec_pagetables:%lu bounce:%lu\n"
|
|
" kernel_misc_reclaimable:%lu\n"
|
|
" free:%lu free_pcp:%lu free_cma:%lu\n",
|
|
global_node_page_state(NR_ACTIVE_ANON),
|
|
global_node_page_state(NR_INACTIVE_ANON),
|
|
global_node_page_state(NR_ISOLATED_ANON),
|
|
global_node_page_state(NR_ACTIVE_FILE),
|
|
global_node_page_state(NR_INACTIVE_FILE),
|
|
global_node_page_state(NR_ISOLATED_FILE),
|
|
global_node_page_state(NR_UNEVICTABLE),
|
|
global_node_page_state(NR_FILE_DIRTY),
|
|
global_node_page_state(NR_WRITEBACK),
|
|
global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B),
|
|
global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B),
|
|
global_node_page_state(NR_FILE_MAPPED),
|
|
global_node_page_state(NR_SHMEM),
|
|
global_node_page_state(NR_PAGETABLE),
|
|
global_node_page_state(NR_SECONDARY_PAGETABLE),
|
|
global_zone_page_state(NR_BOUNCE),
|
|
global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE),
|
|
global_zone_page_state(NR_FREE_PAGES),
|
|
free_pcp,
|
|
global_zone_page_state(NR_FREE_CMA_PAGES));
|
|
|
|
for_each_online_pgdat(pgdat) {
|
|
if (show_mem_node_skip(filter, pgdat->node_id, nodemask))
|
|
continue;
|
|
if (!node_has_managed_zones(pgdat, max_zone_idx))
|
|
continue;
|
|
|
|
printk("Node %d"
|
|
" active_anon:%lukB"
|
|
" inactive_anon:%lukB"
|
|
" active_file:%lukB"
|
|
" inactive_file:%lukB"
|
|
" unevictable:%lukB"
|
|
" isolated(anon):%lukB"
|
|
" isolated(file):%lukB"
|
|
" mapped:%lukB"
|
|
" dirty:%lukB"
|
|
" writeback:%lukB"
|
|
" shmem:%lukB"
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
" shmem_thp:%lukB"
|
|
" shmem_pmdmapped:%lukB"
|
|
" anon_thp:%lukB"
|
|
#endif
|
|
" writeback_tmp:%lukB"
|
|
" kernel_stack:%lukB"
|
|
#ifdef CONFIG_SHADOW_CALL_STACK
|
|
" shadow_call_stack:%lukB"
|
|
#endif
|
|
" pagetables:%lukB"
|
|
" sec_pagetables:%lukB"
|
|
" all_unreclaimable? %s"
|
|
"\n",
|
|
pgdat->node_id,
|
|
K(node_page_state(pgdat, NR_ACTIVE_ANON)),
|
|
K(node_page_state(pgdat, NR_INACTIVE_ANON)),
|
|
K(node_page_state(pgdat, NR_ACTIVE_FILE)),
|
|
K(node_page_state(pgdat, NR_INACTIVE_FILE)),
|
|
K(node_page_state(pgdat, NR_UNEVICTABLE)),
|
|
K(node_page_state(pgdat, NR_ISOLATED_ANON)),
|
|
K(node_page_state(pgdat, NR_ISOLATED_FILE)),
|
|
K(node_page_state(pgdat, NR_FILE_MAPPED)),
|
|
K(node_page_state(pgdat, NR_FILE_DIRTY)),
|
|
K(node_page_state(pgdat, NR_WRITEBACK)),
|
|
K(node_page_state(pgdat, NR_SHMEM)),
|
|
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
|
|
K(node_page_state(pgdat, NR_SHMEM_THPS)),
|
|
K(node_page_state(pgdat, NR_SHMEM_PMDMAPPED)),
|
|
K(node_page_state(pgdat, NR_ANON_THPS)),
|
|
#endif
|
|
K(node_page_state(pgdat, NR_WRITEBACK_TEMP)),
|
|
node_page_state(pgdat, NR_KERNEL_STACK_KB),
|
|
#ifdef CONFIG_SHADOW_CALL_STACK
|
|
node_page_state(pgdat, NR_KERNEL_SCS_KB),
|
|
#endif
|
|
K(node_page_state(pgdat, NR_PAGETABLE)),
|
|
K(node_page_state(pgdat, NR_SECONDARY_PAGETABLE)),
|
|
pgdat->kswapd_failures >= MAX_RECLAIM_RETRIES ?
|
|
"yes" : "no");
|
|
}
|
|
|
|
for_each_populated_zone(zone) {
|
|
int i;
|
|
|
|
if (zone_idx(zone) > max_zone_idx)
|
|
continue;
|
|
if (show_mem_node_skip(filter, zone_to_nid(zone), nodemask))
|
|
continue;
|
|
|
|
free_pcp = 0;
|
|
for_each_online_cpu(cpu)
|
|
free_pcp += per_cpu_ptr(zone->per_cpu_pageset, cpu)->count;
|
|
|
|
show_node(zone);
|
|
printk(KERN_CONT
|
|
"%s"
|
|
" free:%lukB"
|
|
" boost:%lukB"
|
|
" min:%lukB"
|
|
" low:%lukB"
|
|
" high:%lukB"
|
|
" reserved_highatomic:%luKB"
|
|
" active_anon:%lukB"
|
|
" inactive_anon:%lukB"
|
|
" active_file:%lukB"
|
|
" inactive_file:%lukB"
|
|
" unevictable:%lukB"
|
|
" writepending:%lukB"
|
|
" present:%lukB"
|
|
" managed:%lukB"
|
|
" mlocked:%lukB"
|
|
" bounce:%lukB"
|
|
" free_pcp:%lukB"
|
|
" local_pcp:%ukB"
|
|
" free_cma:%lukB"
|
|
"\n",
|
|
zone->name,
|
|
K(zone_page_state(zone, NR_FREE_PAGES)),
|
|
K(zone->watermark_boost),
|
|
K(min_wmark_pages(zone)),
|
|
K(low_wmark_pages(zone)),
|
|
K(high_wmark_pages(zone)),
|
|
K(zone->nr_reserved_highatomic),
|
|
K(zone_page_state(zone, NR_ZONE_ACTIVE_ANON)),
|
|
K(zone_page_state(zone, NR_ZONE_INACTIVE_ANON)),
|
|
K(zone_page_state(zone, NR_ZONE_ACTIVE_FILE)),
|
|
K(zone_page_state(zone, NR_ZONE_INACTIVE_FILE)),
|
|
K(zone_page_state(zone, NR_ZONE_UNEVICTABLE)),
|
|
K(zone_page_state(zone, NR_ZONE_WRITE_PENDING)),
|
|
K(zone->present_pages),
|
|
K(zone_managed_pages(zone)),
|
|
K(zone_page_state(zone, NR_MLOCK)),
|
|
K(zone_page_state(zone, NR_BOUNCE)),
|
|
K(free_pcp),
|
|
K(this_cpu_read(zone->per_cpu_pageset->count)),
|
|
K(zone_page_state(zone, NR_FREE_CMA_PAGES)));
|
|
printk("lowmem_reserve[]:");
|
|
for (i = 0; i < MAX_NR_ZONES; i++)
|
|
printk(KERN_CONT " %ld", zone->lowmem_reserve[i]);
|
|
printk(KERN_CONT "\n");
|
|
}
|
|
|
|
for_each_populated_zone(zone) {
|
|
unsigned int order;
|
|
unsigned long nr[NR_PAGE_ORDERS], flags, total = 0;
|
|
unsigned char types[NR_PAGE_ORDERS];
|
|
|
|
if (zone_idx(zone) > max_zone_idx)
|
|
continue;
|
|
if (show_mem_node_skip(filter, zone_to_nid(zone), nodemask))
|
|
continue;
|
|
show_node(zone);
|
|
printk(KERN_CONT "%s: ", zone->name);
|
|
|
|
spin_lock_irqsave(&zone->lock, flags);
|
|
for (order = 0; order < NR_PAGE_ORDERS; order++) {
|
|
struct free_area *area = &zone->free_area[order];
|
|
int type;
|
|
|
|
nr[order] = area->nr_free;
|
|
total += nr[order] << order;
|
|
|
|
types[order] = 0;
|
|
for (type = 0; type < MIGRATE_TYPES; type++) {
|
|
if (!free_area_empty(area, type))
|
|
types[order] |= 1 << type;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&zone->lock, flags);
|
|
for (order = 0; order < NR_PAGE_ORDERS; order++) {
|
|
printk(KERN_CONT "%lu*%lukB ",
|
|
nr[order], K(1UL) << order);
|
|
if (nr[order])
|
|
show_migration_types(types[order]);
|
|
}
|
|
printk(KERN_CONT "= %lukB\n", K(total));
|
|
}
|
|
|
|
for_each_online_node(nid) {
|
|
if (show_mem_node_skip(filter, nid, nodemask))
|
|
continue;
|
|
hugetlb_show_meminfo_node(nid);
|
|
}
|
|
|
|
printk("%ld total pagecache pages\n", global_node_page_state(NR_FILE_PAGES));
|
|
|
|
show_swap_cache_info();
|
|
}
|
|
|
|
void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
|
|
{
|
|
unsigned long total = 0, reserved = 0, highmem = 0;
|
|
struct zone *zone;
|
|
|
|
printk("Mem-Info:\n");
|
|
show_free_areas(filter, nodemask, max_zone_idx);
|
|
|
|
for_each_populated_zone(zone) {
|
|
|
|
total += zone->present_pages;
|
|
reserved += zone->present_pages - zone_managed_pages(zone);
|
|
|
|
if (is_highmem(zone))
|
|
highmem += zone->present_pages;
|
|
}
|
|
|
|
printk("%lu pages RAM\n", total);
|
|
printk("%lu pages HighMem/MovableOnly\n", highmem);
|
|
printk("%lu pages reserved\n", reserved);
|
|
#ifdef CONFIG_CMA
|
|
printk("%lu pages cma reserved\n", totalcma_pages);
|
|
#endif
|
|
#ifdef CONFIG_MEMORY_FAILURE
|
|
printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
|
|
#endif
|
|
}
|
|
EXPORT_SYMBOL(__show_mem);
|