Re: [Question] VFIO migration will not be aborted in a corner scenario

["Cédric Le Goater" <clg@redhat.com>]

Hello,

+ Avihai

On 8/11/25 18:02, Kunkun Jiang wrote:
> Hi all,
> 
> While testing VFIO migration, I encountered an corner scenario case:
> VFIO migration will not be aborted when the vfio device of dst-vm fails to transition from RESUMING to RUNNING state in vfio_vmstate_change.
> 
> I saw the comments in the vfio_vmstate_change but I don't understand why no action is taken for this situation. 

There is error handling in vfio_vmstate_change() :

         /*
          * Migration should be aborted in this case, but vm_state_notify()
          * currently does not support reporting failures.
          */
         migration_file_set_error(ret, local_err);

> Allowing the live migration process to continue could cause unrecoverable damage to the VM. In this case, can we directly exit the dst-vm? Through the return-path mechanism, the src-vm can continue to run.
> 
> Looking forward to your reply.

I suggest you open an issue on :

   https://gitlab.com/qemu-project/qemu/-/issues/

with a detailed description of your environment :
   
   Host HW, Host OS, QEMU version, QEMU command line, Guest OS, etc.

A template is provided when a new issue is created.


Thanks,

C.