r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./cgroup/cgroup.procs\x00', 0x0, 0x0)
readv(r0, &(0x7f0000003340)=[{&(0x7f0000000000)=""/73, 0x49}], 0x1)
preadv(r0, &(0x7f0000000200)=[{&(0x7f0000000080)=""/52, 0x34}], 0x1, 0x0, 0x0)