Re: [PATCH v8 3/5] virtio_balloon: introduce migration primitivesto balloon pages

[Peter Zijlstra]

On Tue, 2012-08-21 at 17:40 +0300, Michael S. Tsirkin wrote:
> > +     vb->balloon_status = BALLOON_REMOVAL;
> 
> This needs some kind of barrier.
> 
> >       kthread_stop(vb->thread); 

kthread_stop() implies an smp_wmb() [ because it needs to do a wakeup ].
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