mmap anonymous: configurable size

userland/c/malloc_max.c

@@ -0,0 +1,18 @@
+/* https://cirosantilli.com/linux-kernel-module-cheat#malloc-maximum-size */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+    char *ptr = NULL;
+    size_t size = 1;
+    while (1) {
+        printf("0x%zx\n", size);
+        ptr = realloc(ptr, size);
+        if (ptr == NULL) {
+            break;
+        } else {
+            size <<= 1;
+        }
+    }
+}