gistfile1.c

#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>

#define CHILDREN 50

void
spin(void) {
	while (1) {
		int fh = open("/dev/kmem", O_RDWR, 0);
		if (fh >= 0)
			close(fh);
	}
}

int
main(void) {
	uint32_t i;

	for (i = 0; i < CHILDREN; i++) {
		pid_t p = fork();
		if (p == 0) /* child */
			spin();
	}
	spin();
	return 0;
}