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

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

[pork-prince]

Public bug reported:

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);
    ------
}

** Affects: qemu
     Importance: Undecided
         Status: New

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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);
      ------
  }

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

[pork-prince]

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.

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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);
      ------
  }

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

[Zhang Chen]

In qemu upstream COLO project can not fully running, you can test my internal branch.
https://github.com/zhangckid/qemu/commits/colo-with-virtio-net-internal-jul10

Thanks
Zhang Chen

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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);
      ------
  }

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

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another system. For this we need to know which bugs are still valid and which could be closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state back to "New" within the next 60 days, otherwise this report will be marked as "Expired". Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1702798

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

Status in QEMU:
  Incomplete

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);
      ------
  }

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

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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

Status in QEMU:
  Expired

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