[Qemu-devel] [Bug 1702798] Re: colo: secondary vm can't receive any packet

[pork-prince <1702798@bugs.launchpad.net>]

The qemu version is 2.9.0 release.
The secondary vm state make me confused. I tried to add vm_stop and vm_start in colo_process_incoming_thread function, but it crashed.

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1702798

Title:
  colo: secondary vm can't receive any packet

Status in QEMU:
  New

Bug description:
  Following document 'COLO-FT.txt', I test colo feature on my hosts. It seems goes well,but I found the secondary vm can't receive any packets. I attached the process and find out the reason as follow, the filter-redirector(red0) didn't flush it's queue because the secondary vm in migrate state(RUN_STATE_INMIGRATE) :
  int qemu_can_send_packet(NetClientState *sender)
  {
      int vm_running = runstate_is_running():

      if (!vm_running) {         // it will return false on the secondary vm
          return 0;
      }
      ------
  }

  How does it produce outbound packets in the secondary vm as it in migrate state?
  static void *qemu_kvm_cpu_thread_fn(void *arg)
  {
      ------
      do {
          if (cpu_can_run(cpu)) {      // it will return false on the secondary vm
              r = kvm_cpu_exec(cpu);
      ------
  }

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1702798/+subscriptions