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-rw-r--r--lib/show_mem.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/lib/show_mem.c b/lib/show_mem.c
new file mode 100644
index 000000000..0d7585cde
--- /dev/null
+++ b/lib/show_mem.c
@@ -0,0 +1,44 @@
+// 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)
+{
+ pg_data_t *pgdat;
+ unsigned long total = 0, reserved = 0, highmem = 0;
+
+ printk("Mem-Info:\n");
+ __show_free_areas(filter, nodemask, max_zone_idx);
+
+ for_each_online_pgdat(pgdat) {
+ int zoneid;
+
+ for (zoneid = 0; zoneid < MAX_NR_ZONES; zoneid++) {
+ struct zone *zone = &pgdat->node_zones[zoneid];
+ if (!populated_zone(zone))
+ continue;
+
+ total += zone->present_pages;
+ reserved += zone->present_pages - zone_managed_pages(zone);
+
+ if (is_highmem_idx(zoneid))
+ 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
+}