r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000000)='/proc/vmstat\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000600)=[{&(0x7f00000001c0)=""/239, 0xef}], 0x1, 0xfffff000, 0x0)