void show_mem(void) { int total = 0, reserved = 0; int shared = 0, cached = 0; int highmem = 0; struct page *page; pg_data_t *pgdat; unsigned long i; struct page_state ps; unsigned long flags; printk(KERN_INFO "Mem-info:\n"); show_free_areas(); printk(KERN_INFO "Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10)); for_each_online_pgdat(pgdat) { pgdat_resize_lock(pgdat, &flags); for (i = 0; i < pgdat->node_spanned_pages; ++i) { page = pgdat_page_nr(pgdat, i); total++; if (PageHighMem(page)) highmem++; if (PageReserved(page)) reserved++; else if (PageSwapCache(page)) cached++; else if (page_count(page)) shared += page_count(page) - 1; } pgdat_resize_unlock(pgdat, &flags); } printk(KERN_INFO "%d pages of RAM\n", total); printk(KERN_INFO "%d pages of HIGHMEM\n", highmem); printk(KERN_INFO "%d reserved pages\n", reserved); printk(KERN_INFO "%d pages shared\n", shared); printk(KERN_INFO "%d pages swap cached\n", cached); get_page_state(&ps); printk(KERN_INFO "%lu pages dirty\n", ps.nr_dirty); printk(KERN_INFO "%lu pages writeback\n", ps.nr_writeback); printk(KERN_INFO "%lu pages mapped\n", ps.nr_mapped); printk(KERN_INFO "%lu pages slab\n", ps.nr_slab); printk(KERN_INFO "%lu pages pagetables\n", ps.nr_page_table_pages); }
static int meminfo_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data) { struct sysinfo i; int len; struct page_state ps; unsigned long inactive; unsigned long active; unsigned long free; unsigned long committed; unsigned long allowed; struct vmalloc_info vmi; long cached; get_page_state(&ps); get_zone_counts(&active, &inactive, &free); /* * display in kilobytes. */ #define K(x) ((x) << (PAGE_SHIFT - 10)) si_meminfo(&i); si_swapinfo(&i); committed = atomic_read(&vm_committed_space); allowed = ((totalram_pages - hugetlb_total_pages()) * sysctl_overcommit_ratio / 100) + total_swap_pages; cached = get_page_cache_size() - total_swapcache_pages - i.bufferram; if (cached < 0) cached = 0; get_vmalloc_info(&vmi); /* * Tagged format, for easy grepping and expansion. */ len = sprintf(page, "MemTotal: %8lu kB\n" "MemFree: %8lu kB\n" "Buffers: %8lu kB\n" "Cached: %8lu kB\n" "SwapCached: %8lu kB\n" "Active: %8lu kB\n" "Inactive: %8lu kB\n" "HighTotal: %8lu kB\n" "HighFree: %8lu kB\n" "LowTotal: %8lu kB\n" "LowFree: %8lu kB\n" "SwapTotal: %8lu kB\n" "SwapFree: %8lu kB\n" "Dirty: %8lu kB\n" "Writeback: %8lu kB\n" "Mapped: %8lu kB\n" "Slab: %8lu kB\n" "CommitLimit: %8lu kB\n" "Committed_AS: %8lu kB\n" "PageTables: %8lu kB\n" "VmallocTotal: %8lu kB\n" "VmallocUsed: %8lu kB\n" "VmallocChunk: %8lu kB\n", K(i.totalram), K(i.freeram), K(i.bufferram), K(cached), K(total_swapcache_pages), K(active), K(inactive), K(i.totalhigh), K(i.freehigh), K(i.totalram-i.totalhigh), K(i.freeram-i.freehigh), K(i.totalswap), K(i.freeswap), K(ps.nr_dirty), K(ps.nr_writeback), K(ps.nr_mapped), K(ps.nr_slab), K(allowed), K(committed), K(ps.nr_page_table_pages), (unsigned long)VMALLOC_TOTAL >> 10, vmi.used >> 10, vmi.largest_chunk >> 10 ); len += hugetlb_report_meminfo(page + len); return proc_calc_metrics(page, start, off, count, eof, len); #undef K }