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Commit 454c63b0 authored by Johannes Weiner's avatar Johannes Weiner Committed by Linus Torvalds
Browse files

lib: generic show_mem() 



This implements a platform-independent version of show_mem().

Signed-off-by: default avatarJohannes Weiner <hannes@saeurebad.de>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Bryan Wu <cooloney@kernel.org>
Cc: Chris Zankel <chris@zankel.net>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Mikael Starvik <starvik@axis.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 2c97b7fc

lib/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -11,7 +11,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \ 
	 rbtree.o radix-tree.o dump_stack.o \

	 idr.o int_sqrt.o extable.o prio_tree.o \

	 sha1.o irq_regs.o reciprocal_div.o argv_split.o \

	 proportions.o prio_heap.o ratelimit.o

	 proportions.o prio_heap.o ratelimit.o show_mem.o



lib-$(CONFIG_MMU) += ioremap.o

lib-$(CONFIG_SMP) += cpumask.o

lib/show_mem.c

0 → 100644
+63 −0
Original line number Diff line number Diff line 
/*

 * Generic show_mem() implementation

 *

 * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>

 * All code subject to the GPL version 2.

 */



#include <linux/mm.h>

#include <linux/nmi.h>

#include <linux/quicklist.h>



void show_mem(void)

{

	pg_data_t *pgdat;

	unsigned long total = 0, reserved = 0, shared = 0,

		nonshared = 0, highmem = 0;



	printk(KERN_INFO "Mem-Info:\n");

	show_free_areas();



	for_each_online_pgdat(pgdat) {

		unsigned long i, flags;



		pgdat_resize_lock(pgdat, &flags);

		for (i = 0; i < pgdat->node_spanned_pages; i++) {

			struct page *page;

			unsigned long pfn = pgdat->node_start_pfn + i;



			if (unlikely(!(i % MAX_ORDER_NR_PAGES)))

				touch_nmi_watchdog();



			if (!pfn_valid(pfn))

				continue;



			page = pfn_to_page(pfn);



			if (PageHighMem(page))

				highmem++;



			if (PageReserved(page))

				reserved++;

			else if (page_count(page) == 1)

				nonshared++;

			else if (page_count(page) > 1)

				shared += page_count(page) - 1;



			total++;

		}

		pgdat_resize_unlock(pgdat, &flags);

	}



	printk(KERN_INFO "%lu pages RAM\n", total);

#ifdef CONFIG_HIGHMEM

	printk(KERN_INFO "%lu pages HighMem\n", highmem);

#endif

	printk(KERN_INFO "%lu pages reserved\n", reserved);

	printk(KERN_INFO "%lu pages shared\n", shared);

	printk(KERN_INFO "%lu pages non-shared\n", nonshared);

#ifdef CONFIG_QUICKLIST

	printk(KERN_INFO "%lu pages in pagetable cache\n",

		quicklist_total_size());

#endif

}