/dev/ramX devices do not work with --disk

[KJ7LNW]

SUMMARY

sda works, ram0 doesn't show:

dool  -D sda,ram0
┄┄total┄cpu┄usage┄┄┬┄┄dsk/sda┄┄┬┄net/total┄┬┄┄┄load┄avg┄┄┄┬┄┄┄┄┄system┄┄┄┄
usr sys idl wai stl│ read  writ│ recv  send│ 1m   5m  15m │      time     
  0   1  99   0   0│  27k  116k│   0     0 │0.21 0.28 0.27│Nov-30 13:51:05

ISSUE TYPE

• Bug Report

DOOL VERSION

~1.3.1 (dool-next)

OS / ENVIRONMENT

oracle linux 9

STEPS TO REPRODUCE

modprobe brd rd_size=$((1 * 1024*1024)) rd_nr=2
dool  -D sda,ram0

EXPECTED RESULTS

ram0 IO stats

ACTUAL RESULTS

ram0 is not listed.