direct-write-1M+64k+4k

#!/bin/sh

mkdir /cgroup/dd
echo $$ > /cgroup/dd/tasks

dd if=/dev/zero of=/fs/zero-1M  bs=1M  oflag=direct conv=fsync &
dd if=/dev/zero of=/fs/zero-64k bs=64k oflag=direct conv=fsync &
dd if=/dev/zero of=/fs/zero-4k  bs=4k  oflag=direct conv=fsync &