void show_mem(void)
{
int free = 0, total = 0, reserved = 0;
int shared = 0, cached = 0, slab = 0, node;
printk("Mem-info:\n");
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
for_each_online_node(node) {
struct page *page, *end;
page = NODE_MEM_MAP(node);
end = page + NODE_DATA(node)->node_spanned_pages;
do {
total++;
if (PageReserved(page))
reserved++;
else if (PageSwapCache(page))
cached++;
else if (PageSlab(page))
slab++;
else if (!page_count(page))
free++;
else
shared += page_count(page) - 1;
page++;
} while (page < end);
}
printk("%d pages of RAM\n", total);
printk("%d free pages\n", free);
printk("%d reserved pages\n", reserved);
printk("%d slab pages\n", slab);
printk("%d pages shared\n", shared);
printk("%d pages swap cached\n", cached);
}
static int memmap_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
static int *bitmap = NULL;
struct page *p, *end;
int mark;
int len = 0;
int free = 0;
int total = 0;
int i, bit, start_pfn, end_pfn, array_size = 0;
int array_bounds, pfn = 0;
p = NODE_MEM_MAP(0);
start_pfn = (int)page_to_pfn(p);
end_pfn = start_pfn + num_physpages;
end = pfn_to_page(end_pfn);
array_size = end_pfn - start_pfn;
array_bounds = array_size / BITS_PER_INT;
if (bitmap == NULL) {
bitmap = (unsigned int *)kmalloc(array_size / sizeof (int),
GFP_KERNEL);
}
/*
* one means used, zero means free, set them all to 1,
* clear them as we find them free.
*/
for (i = 0; i < array_bounds; i++) {
bitmap[i] = 0xffffffff;
}
total = free = 0;
do {
total++;
pfn = page_to_pfn(p);
if (!PageReserved(p) && page_count(p) == 0 && pfn_valid(pfn)) {
i = pfn - start_pfn;
bit = i % BITS_PER_INT;
i /= BITS_PER_INT;
free++;
bitmap[i] &= ~(1<<bit);
if (mem_acc_debug)
printk("i %d bit %d pfn %d pa 0x%x c %d\n",
index, bit, pfn, page_to_phys(p),
page_count(p));
}
p++;
} while (p < end);
mark = total - free;
if (mark < lowwater) {
lowwater = mark;
}
if (mark > highwater) {
highwater = mark;
}
if (off == 0) {
index = 0;
len = sprintf(page,
"High water used pages %d Low water used pages %d\n",
highwater, lowwater);
} else if (index == -1) {
index = 0;
*eof = 1;
return 0;
}
for (index; index < array_bounds && len+ONE_LINE < count; index += 8) {
len += sprintf(page + len, "%08x%08x%08x%08x%08x%08x%08x%08x\n",
bitmap[index], bitmap[index + 1], bitmap[index + 2],
bitmap[index + 3], bitmap[index + 4], bitmap[index + 5],
bitmap[index + 6], bitmap[index + 7]);
}
if (index >= array_bounds || len > count) {
index == -1;
kfree(bitmap);
bitmap = NULL;
}
*start = page;
return len;
}
