Re: [PATCH 2/5] Paravirt cpu batching.patch

[Zachary Amsden]

Chuck Ebbert wrote:
> In-Reply-To: <20061212225430.GC10475@xxxxxxxxxxxxxxxxxxxx>
>
> On Tue, 12 Dec 2006 14:54:30 -0800, Chros Wright wrote:
>
>   
> > > --- a/arch/i386/kernel/process.c    Tue Dec 12 13:50:50 2006 -0800
> > > +++ b/arch/i386/kernel/process.c    Tue Dec 12 13:50:53 2006 -0800
> > > @@ -665,6 +665,37 @@ struct task_struct fastcall * __switch_t
> > >     load_TLS(next, cpu);
> > >  
> > >     /*
> > > +    * Restore IOPL if needed.
> > > +    */
> > > +   if (unlikely(prev->iopl != next->iopl))
> > > +           set_iopl_mask(next->iopl);
> > >       
> > Small sidenote that this bit undoes a recent change from Chuck Ebbert, which
> > killed iopl_mask update via hypervisor.
> >     
>
> This whole thing needs a proper fix IMO.  I posted something a while back
> but Andi didn't like it, I guess.
>   

We can handle this one with an #ifdef CONFIG_PARAVIRT, though.

Zach
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