DF-2463 run: swap off -> memhog -> pressure -> mtarget+idrv
vm.swap_enabled: 1 -> 0
memhog pid=1014; waiting for pressure...
  v_free_count=847399
  v_free_count=527380
  v_free_count=298256
  v_free_count=9237
  pressure reached
--- starting idrv (receiver) under pressure ---
idrv: session id=0
idrv: receiver running for 30s
idrv: alive after 30s
IDRV_EXIT=0
vm.swap_enabled: 0 -> 1
DF-2463 run complete (if we got here, no panic)
RUN_RC=0

# Earlier run (swap off, memhog 16MB chunks, 6s idrv window):
DF-2463 run: starting mtarget, memhog (swap off), then idrv
vm.swap_enabled: 1 -> 0
memhog pid=...; v_free_count before idrv: 401115
idrv: session id=0 / opened /dev/iscsi0 / connected / ISCSISETSOC done
idrv: still alive after 6s (no panic)
--- v_free_count after idrv: 55504 ---
vm.swap_enabled: 0 -> 1
# No panic in either run despite v_free_count driven to ~9237 pages (~36MB),
# well below default thresholds.