[linux-block.git] / fs / proc / meminfo.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/mman.h>
#include <linux/mmzone.h>
#include <linux/proc_fs.h>
#include <linux/percpu.h>
#include <linux/seq_file.h>
#include <linux/swap.h>
#include <linux/vmstat.h>
#include <linux/atomic.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_CMA
#include <linux/cma.h>
#endif
#include <asm/page.h>
#include "internal.h"

void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
{
}

static void show_val_kb(struct seq_file *m, const char *s, unsigned long num)
{
	seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
	seq_write(m, " kB\n", 4);
}

static int meminfo_proc_show(struct seq_file *m, void *v)
{
	struct sysinfo i;
	unsigned long committed;
	long cached;
	long available;
	unsigned long pages[NR_LRU_LISTS];
	unsigned long sreclaimable, sunreclaim;
	int lru;

	si_meminfo(&i);
	si_swapinfo(&i);
	committed = vm_memory_committed();

	cached = global_node_page_state(NR_FILE_PAGES) -
			total_swapcache_pages() - i.bufferram;
	if (cached < 0)
		cached = 0;

	for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
		pages[lru] = global_node_page_state(NR_LRU_BASE + lru);

	available = si_mem_available();
	sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
	sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);

	show_val_kb(m, "MemTotal:       ", i.totalram);
	show_val_kb(m, "MemFree:        ", i.freeram);
	show_val_kb(m, "MemAvailable:   ", available);
	show_val_kb(m, "Buffers:        ", i.bufferram);
	show_val_kb(m, "Cached:         ", cached);
	show_val_kb(m, "SwapCached:     ", total_swapcache_pages());
	show_val_kb(m, "Active:         ", pages[LRU_ACTIVE_ANON] +
					   pages[LRU_ACTIVE_FILE]);
	show_val_kb(m, "Inactive:       ", pages[LRU_INACTIVE_ANON] +
					   pages[LRU_INACTIVE_FILE]);
	show_val_kb(m, "Active(anon):   ", pages[LRU_ACTIVE_ANON]);
	show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
	show_val_kb(m, "Active(file):   ", pages[LRU_ACTIVE_FILE]);
	show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
	show_val_kb(m, "Unevictable:    ", pages[LRU_UNEVICTABLE]);
	show_val_kb(m, "Mlocked:        ", global_zone_page_state(NR_MLOCK));

#ifdef CONFIG_HIGHMEM
	show_val_kb(m, "HighTotal:      ", i.totalhigh);
	show_val_kb(m, "HighFree:       ", i.freehigh);
	show_val_kb(m, "LowTotal:       ", i.totalram - i.totalhigh);
	show_val_kb(m, "LowFree:        ", i.freeram - i.freehigh);
#endif

#ifndef CONFIG_MMU
	show_val_kb(m, "MmapCopy:       ",
		    (unsigned long)atomic_long_read(&mmap_pages_allocated));
#endif

	show_val_kb(m, "SwapTotal:      ", i.totalswap);
	show_val_kb(m, "SwapFree:       ", i.freeswap);
#ifdef CONFIG_ZSWAP
	seq_printf(m,  "Zswap:          %8lu kB\n",
		   (unsigned long)(zswap_pool_total_size >> 10));
	seq_printf(m,  "Zswapped:       %8lu kB\n",
		   (unsigned long)atomic_read(&zswap_stored_pages) <<
		   (PAGE_SHIFT - 10));
#endif
	show_val_kb(m, "Dirty:          ",
		    global_node_page_state(NR_FILE_DIRTY));
	show_val_kb(m, "Writeback:      ",
		    global_node_page_state(NR_WRITEBACK));
	show_val_kb(m, "AnonPages:      ",
		    global_node_page_state(NR_ANON_MAPPED));
	show_val_kb(m, "Mapped:         ",
		    global_node_page_state(NR_FILE_MAPPED));
	show_val_kb(m, "Shmem:          ", i.sharedram);
	show_val_kb(m, "KReclaimable:   ", sreclaimable +
		    global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
	show_val_kb(m, "Slab:           ", sreclaimable + sunreclaim);
	show_val_kb(m, "SReclaimable:   ", sreclaimable);
	show_val_kb(m, "SUnreclaim:     ", sunreclaim);
	seq_printf(m, "KernelStack:    %8lu kB\n",
		   global_node_page_state(NR_KERNEL_STACK_KB));
#ifdef CONFIG_SHADOW_CALL_STACK
	seq_printf(m, "ShadowCallStack:%8lu kB\n",
		   global_node_page_state(NR_KERNEL_SCS_KB));
#endif
	show_val_kb(m, "PageTables:     ",
		    global_node_page_state(NR_PAGETABLE));
	show_val_kb(m, "SecPageTables:  ",
		    global_node_page_state(NR_SECONDARY_PAGETABLE));

	show_val_kb(m, "NFS_Unstable:   ", 0);
	show_val_kb(m, "Bounce:         ",
		    global_zone_page_state(NR_BOUNCE));
	show_val_kb(m, "WritebackTmp:   ",
		    global_node_page_state(NR_WRITEBACK_TEMP));
	show_val_kb(m, "CommitLimit:    ", vm_commit_limit());
	show_val_kb(m, "Committed_AS:   ", committed);
	seq_printf(m, "VmallocTotal:   %8lu kB\n",
		   (unsigned long)VMALLOC_TOTAL >> 10);
	show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
	show_val_kb(m, "VmallocChunk:   ", 0ul);
	show_val_kb(m, "Percpu:         ", pcpu_nr_pages());

#ifdef CONFIG_MEMORY_FAILURE
	seq_printf(m, "HardwareCorrupted: %5lu kB\n",
		   atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
#endif

#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	show_val_kb(m, "AnonHugePages:  ",
		    global_node_page_state(NR_ANON_THPS));
	show_val_kb(m, "ShmemHugePages: ",
		    global_node_page_state(NR_SHMEM_THPS));
	show_val_kb(m, "ShmemPmdMapped: ",
		    global_node_page_state(NR_SHMEM_PMDMAPPED));
	show_val_kb(m, "FileHugePages:  ",
		    global_node_page_state(NR_FILE_THPS));
	show_val_kb(m, "FilePmdMapped:  ",
		    global_node_page_state(NR_FILE_PMDMAPPED));
#endif

#ifdef CONFIG_CMA
	show_val_kb(m, "CmaTotal:       ", totalcma_pages);
	show_val_kb(m, "CmaFree:        ",
		    global_zone_page_state(NR_FREE_CMA_PAGES));
#endif

	hugetlb_report_meminfo(m);

	arch_report_meminfo(m);

	return 0;
}

static int __init proc_meminfo_init(void)
{
	struct proc_dir_entry *pde;

	pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
	pde_make_permanent(pde);
	return 0;
}
fs_initcall(proc_meminfo_init);
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	#include <linux/fs.h>
	3	#include <linux/init.h>
	4	#include <linux/kernel.h>
	5	#include <linux/mm.h>
	6	#include <linux/hugetlb.h>
	7	#include <linux/mman.h>
	8	#include <linux/mmzone.h>
	9	#include <linux/proc_fs.h>
	10	#include <linux/percpu.h>
	11	#include <linux/seq_file.h>
	12	#include <linux/swap.h>
	13	#include <linux/vmstat.h>
	14	#include <linux/atomic.h>
	15	#include <linux/vmalloc.h>
	16	#ifdef CONFIG_CMA
	17	#include <linux/cma.h>
	18	#endif
	19	#include <asm/page.h>
	20	#include "internal.h"
	21
	22	void __attribute__((weak)) arch_report_meminfo(struct seq_file *m)
	23	{
	24	}
	25
	26	static void show_val_kb(struct seq_file m, const char s, unsigned long num)
	27	{
	28	seq_put_decimal_ull_width(m, s, num << (PAGE_SHIFT - 10), 8);
	29	seq_write(m, " kB\n", 4);
	30	}
	31
	32	static int meminfo_proc_show(struct seq_file m, void v)
	33	{
	34	struct sysinfo i;
	35	unsigned long committed;
	36	long cached;
	37	long available;
	38	unsigned long pages[NR_LRU_LISTS];
	39	unsigned long sreclaimable, sunreclaim;
	40	int lru;
	41
	42	si_meminfo(&i);
	43	si_swapinfo(&i);
	44	committed = vm_memory_committed();
	45
	46	cached = global_node_page_state(NR_FILE_PAGES) -
	47	total_swapcache_pages() - i.bufferram;
	48	if (cached < 0)
	49	cached = 0;
	50
	51	for (lru = LRU_BASE; lru < NR_LRU_LISTS; lru++)
	52	pages[lru] = global_node_page_state(NR_LRU_BASE + lru);
	53
	54	available = si_mem_available();
	55	sreclaimable = global_node_page_state_pages(NR_SLAB_RECLAIMABLE_B);
	56	sunreclaim = global_node_page_state_pages(NR_SLAB_UNRECLAIMABLE_B);
	57
	58	show_val_kb(m, "MemTotal: ", i.totalram);
	59	show_val_kb(m, "MemFree: ", i.freeram);
	60	show_val_kb(m, "MemAvailable: ", available);
	61	show_val_kb(m, "Buffers: ", i.bufferram);
	62	show_val_kb(m, "Cached: ", cached);
	63	show_val_kb(m, "SwapCached: ", total_swapcache_pages());
	64	show_val_kb(m, "Active: ", pages[LRU_ACTIVE_ANON] +
	65	pages[LRU_ACTIVE_FILE]);
	66	show_val_kb(m, "Inactive: ", pages[LRU_INACTIVE_ANON] +
	67	pages[LRU_INACTIVE_FILE]);
	68	show_val_kb(m, "Active(anon): ", pages[LRU_ACTIVE_ANON]);
	69	show_val_kb(m, "Inactive(anon): ", pages[LRU_INACTIVE_ANON]);
	70	show_val_kb(m, "Active(file): ", pages[LRU_ACTIVE_FILE]);
	71	show_val_kb(m, "Inactive(file): ", pages[LRU_INACTIVE_FILE]);
	72	show_val_kb(m, "Unevictable: ", pages[LRU_UNEVICTABLE]);
	73	show_val_kb(m, "Mlocked: ", global_zone_page_state(NR_MLOCK));
	74
	75	#ifdef CONFIG_HIGHMEM
	76	show_val_kb(m, "HighTotal: ", i.totalhigh);
	77	show_val_kb(m, "HighFree: ", i.freehigh);
	78	show_val_kb(m, "LowTotal: ", i.totalram - i.totalhigh);
	79	show_val_kb(m, "LowFree: ", i.freeram - i.freehigh);
	80	#endif
	81
	82	#ifndef CONFIG_MMU
	83	show_val_kb(m, "MmapCopy: ",
	84	(unsigned long)atomic_long_read(&mmap_pages_allocated));
	85	#endif
	86
	87	show_val_kb(m, "SwapTotal: ", i.totalswap);
	88	show_val_kb(m, "SwapFree: ", i.freeswap);
	89	#ifdef CONFIG_ZSWAP
	90	seq_printf(m, "Zswap: %8lu kB\n",
	91	(unsigned long)(zswap_pool_total_size >> 10));
	92	seq_printf(m, "Zswapped: %8lu kB\n",
	93	(unsigned long)atomic_read(&zswap_stored_pages) <<
	94	(PAGE_SHIFT - 10));
	95	#endif
	96	show_val_kb(m, "Dirty: ",
	97	global_node_page_state(NR_FILE_DIRTY));
	98	show_val_kb(m, "Writeback: ",
	99	global_node_page_state(NR_WRITEBACK));
	100	show_val_kb(m, "AnonPages: ",
	101	global_node_page_state(NR_ANON_MAPPED));
	102	show_val_kb(m, "Mapped: ",
	103	global_node_page_state(NR_FILE_MAPPED));
	104	show_val_kb(m, "Shmem: ", i.sharedram);
	105	show_val_kb(m, "KReclaimable: ", sreclaimable +
	106	global_node_page_state(NR_KERNEL_MISC_RECLAIMABLE));
	107	show_val_kb(m, "Slab: ", sreclaimable + sunreclaim);
	108	show_val_kb(m, "SReclaimable: ", sreclaimable);
	109	show_val_kb(m, "SUnreclaim: ", sunreclaim);
	110	seq_printf(m, "KernelStack: %8lu kB\n",
	111	global_node_page_state(NR_KERNEL_STACK_KB));
	112	#ifdef CONFIG_SHADOW_CALL_STACK
	113	seq_printf(m, "ShadowCallStack:%8lu kB\n",
	114	global_node_page_state(NR_KERNEL_SCS_KB));
	115	#endif
	116	show_val_kb(m, "PageTables: ",
	117	global_node_page_state(NR_PAGETABLE));
	118	show_val_kb(m, "SecPageTables: ",
	119	global_node_page_state(NR_SECONDARY_PAGETABLE));
	120
	121	show_val_kb(m, "NFS_Unstable: ", 0);
	122	show_val_kb(m, "Bounce: ",
	123	global_zone_page_state(NR_BOUNCE));
	124	show_val_kb(m, "WritebackTmp: ",
	125	global_node_page_state(NR_WRITEBACK_TEMP));
	126	show_val_kb(m, "CommitLimit: ", vm_commit_limit());
	127	show_val_kb(m, "Committed_AS: ", committed);
	128	seq_printf(m, "VmallocTotal: %8lu kB\n",
	129	(unsigned long)VMALLOC_TOTAL >> 10);
	130	show_val_kb(m, "VmallocUsed: ", vmalloc_nr_pages());
	131	show_val_kb(m, "VmallocChunk: ", 0ul);
	132	show_val_kb(m, "Percpu: ", pcpu_nr_pages());
	133
	134	#ifdef CONFIG_MEMORY_FAILURE
	135	seq_printf(m, "HardwareCorrupted: %5lu kB\n",
	136	atomic_long_read(&num_poisoned_pages) << (PAGE_SHIFT - 10));
	137	#endif
	138
	139	#ifdef CONFIG_TRANSPARENT_HUGEPAGE
	140	show_val_kb(m, "AnonHugePages: ",
	141	global_node_page_state(NR_ANON_THPS));
	142	show_val_kb(m, "ShmemHugePages: ",
	143	global_node_page_state(NR_SHMEM_THPS));
	144	show_val_kb(m, "ShmemPmdMapped: ",
	145	global_node_page_state(NR_SHMEM_PMDMAPPED));
	146	show_val_kb(m, "FileHugePages: ",
	147	global_node_page_state(NR_FILE_THPS));
	148	show_val_kb(m, "FilePmdMapped: ",
	149	global_node_page_state(NR_FILE_PMDMAPPED));
	150	#endif
	151
	152	#ifdef CONFIG_CMA
	153	show_val_kb(m, "CmaTotal: ", totalcma_pages);
	154	show_val_kb(m, "CmaFree: ",
	155	global_zone_page_state(NR_FREE_CMA_PAGES));
	156	#endif
	157
	158	hugetlb_report_meminfo(m);
	159
	160	arch_report_meminfo(m);
	161
	162	return 0;
	163	}
	164
	165	static int __init proc_meminfo_init(void)
	166	{
	167	struct proc_dir_entry *pde;
	168
	169	pde = proc_create_single("meminfo", 0, NULL, meminfo_proc_show);
	170	pde_make_permanent(pde);
	171	return 0;
	172	}
	173	fs_initcall(proc_meminfo_init);