Re: [Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options.

[Zachary Amsden <zach@xxxxxxxxxx>]

Keir Fraser wrote:
> On 16/2/07 10:19, "Zachary Amsden" <zach@xxxxxxxxxx> wrote:
>
>   
> > Doesn't stop_machine_run already take care of getting you out of all
> > kernel threads?  So you can only be sleeping, not preempted, in which
> > case, this might not be an issue?
> >     
> It ensures that no (non-stopmachine) threads are running on any of the other
> CPUs, but it doesn't guarantee that all threads are at any form of quiescent
> point. They can certainly have private references to machine addresses.
>
> Otherwise, what would be the point of the process freezer? :-)
>   
Yeah, I was over-hoping on that one.  At least thought it was worth 
suggesting as a starting point.  I had similar issues considering 
loading VMI as a module at runtime.
Zach

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