/* * 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(unsigned int filter){	pg_data_t *pgdat;	unsigned long total = 0, reserved = 0, shared = 0,		nonshared = 0, highmem = 0; 	printk("Mem-Info:\n");	show_free_areas(filter); 	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("%lu pages RAM\n", total);#ifdef CONFIG_HIGHMEM	printk("%lu pages HighMem\n", highmem);#endif	printk("%lu pages reserved\n", reserved);	printk("%lu pages shared\n", shared);	printk("%lu pages non-shared\n", nonshared);#ifdef CONFIG_QUICKLIST	printk("%lu pages in pagetable cache\n",		quicklist_total_size());#endif}