* Yang Hongyang ([email protected]) wrote:
> implement colo save
My postcopy 'QEMU_VM_CMD_PACKAGED' does something similar to
parts of this with the QEMUSizedBuffer, we might be able to share some more:
https://lists.nongnu.org/archive/html/qemu-devel/2014-07/msg00886.html
> + /* we send the total size of the vmstate first */
> + ret = colo_ctl_put(s->file, colo_buffer.used);
> + if (ret) {
> + goto out;
> + }
> +
> + qemu_put_buffer_async(s->file, colo_buffer.data, colo_buffer.used);
> + ret = qemu_file_get_error(s->file);
> + if (ret < 0) {
> + goto out;
> + }
> + qemu_fflush(s->file);
Is there a reason to use _async here? I thought the only gain is
if you were going to do other writes in the shadow of the async, with the fflush
immediately after I'm not sure it helps.
Dave
>
> ret = colo_ctl_get(control, COLO_CHECKPOINT_RECEIVED);
> if (ret) {
> goto out;
> }
>
> - /* TODO: Flush network etc. */
> + /* Flush network etc. */
> + colo_compare_flush();
>
> ret = colo_ctl_get(control, COLO_CHECKPOINT_LOADED);
> if (ret) {
> goto out;
> }
>
> - /* TODO: resume master */
> + colo_compare_resume();
> + ret = 0;
>
> out:
> + /* resume master */
> + qemu_mutex_lock_iothread();
> + vm_start();
> + qemu_mutex_unlock_iothread();
> +
> return ret;
> }
>
> --
> 1.9.1
>
--
Dr. David Alan Gilbert / [email protected] / Manchester, UK
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