r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/vmstat\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000200)=[{&(0x7f00000000c0)=""/62, 0x3e}], 0x1, 0x74e, 0x0)