linux/lib/show_mem.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Generic show_mem() implementation
 *
 * Copyright (C) 2008 Johannes Weiner <hannes@saeurebad.de>
 */

#include <linux/mm.h>
#include <linux/cma.h>

void __show_mem(unsigned int filter, nodemask_t *nodemask, int max_zone_idx)
{
	unsigned long total = 0, reserved = 0, highmem = 0;
	struct zone *zone;

	printk("Mem-Info:\n");
	__show_free_areas(filter, nodemask, max_zone_idx);

	for_each_populated_zone(zone) {

		total += zone->present_pages;
		reserved += zone->present_pages - zone_managed_pages(zone);

		if (is_highmem(zone))
			highmem += zone->present_pages;
	}

	printk("%lu pages RAM\n", total);
	printk("%lu pages HighMem/MovableOnly\n", highmem);
	printk("%lu pages reserved\n", reserved);
#ifdef CONFIG_CMA
	printk("%lu pages cma reserved\n", totalcma_pages);
#endif
#ifdef CONFIG_MEMORY_FAILURE
	printk("%lu pages hwpoisoned\n", atomic_long_read(&num_poisoned_pages));
#endif
}