diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Makefile | 2 | ||||
| -rw-r--r-- | lib/show_mem.c | 63 |
2 files changed, 64 insertions, 1 deletions
diff --git a/lib/Makefile b/lib/Makefile index 942c7250f603..3b1f94bbe9de 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -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 diff --git a/lib/show_mem.c b/lib/show_mem.c new file mode 100644 index 000000000000..238e72a18ce1 --- /dev/null +++ b/lib/show_mem.c @@ -0,0 +1,63 @@ +/* + * 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 +} |