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Re: [Qemu-devel] qemu-kvm 1.2, after VM cloning, source_VM error


From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] qemu-kvm 1.2, after VM cloning, source_VM error
Date: Wed, 17 Apr 2013 10:37:45 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Tue, Apr 16, 2013 at 08:02:27PM -0400, Shashaankar Reddy wrote:
> We have taken qemu-kvm version 1.2 for developing a patch that would do
> cloning of a VM using pre-copy based live VM migration in qemu-kvm code.
> 
> After the migration is completed, we could see the cloned_Vm is up and
> running, also handled network configuration (assigning new mac and Ip
> addresses). But where as at the src_VM we see a strange error, when we
> logged into the src_VM via vnc viewer:
> 
>  ide: failed opcode was: unknown
> hdd: task_in_intr: status=0x41 { DriveReady Error }
>  hdd: task_in_intr: error=0x04 { DriveStatusError }
>  ide: failed opcode was: unknown
>  hdd: task_in_intr: status=0x41 { DriveReady Error }
> hdd: task_in_intr: error=0x04 { DriveStatusError }
> 
> --- these above messages are repeating infinitely making the CPU usage
> of the VM to 95-99% and it would not receive any further request to
> serve (we  have an rubis server inside the VM ). Though the VM is
> accessible to the host network (we are able to ping the VM).
> 
> Could any one of you help us in this issue?

Looks like your migration approach breaks IDE device save/load.

How can we help without seeing the code?

Stefan



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