Re: [Qemu-devel] [PATCH 0/2][RFC] postcopy migration: Linux char device for postcopy

[Avi Kivity]

On 12/29/2011 04:49 PM, Isaku Yamahata wrote:
> > > Great, then we agreed with list/reattach basically.
> > > (Maybe identity scheme needs reconsideration.)
> > 
> > I guess we miscommunicated.  Why is reattach needed?  If you have the
> > fd, nothing else is needed.
>
> What if malicious process close the fd and does page fault intentionally?
> Unkillable process issue remains.
> I think we are talking not only qemu case but also general case.

It's not unkillable.  If you sleep with TASK_INTERRUPTIBLE then you can
process signals.  This includes SIGKILL.

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