/usr/share/systemtap/examples/io/ Current File: //usr/share/systemtap/examples/io/mbrwatch.stp

#!/usr/bin/stap

probe ioblock.request {
    if (bdev==bdev_contains && sector<4) {
	printf("device %s sector %d %s, process %s[%d]\n",
		devname, sector, (rw==BIO_READ ? "read":"write"), execname(), pid())
	print_backtrace()
    }
}