r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000540)='/proc/vmstat\x00', 0x0, 0x0)
preadv(r0, &(0x7f0000000240)=[{&(0x7f0000000040)=""/195, 0xc3}], 0x1, 0x400, 0x0)