Re: [PATCH RFC v6 10/11] pvqspinlock, x86: Enable qspinlock PV support for KVM

[Waiman Long]

On 03/14/2014 04:42 AM, Paolo Bonzini wrote:
> Il 13/03/2014 20:13, Waiman Long ha scritto:
> > > >
> > >
> > > This should also disable the unfair path.
> > >
> > > Paolo
> >
> > The unfair lock uses a different jump label and does not require any
> > special PV ops. There is a separate init function for that.
>
> Yeah, what I mean is that the patches that enable paravirtualization 
> should also take care of decreasing the unfair-lock jump label when 
> paravirtualization is enabled.
>
> Paolo

As there are people who don't like unfair lock at all, I prefer to give 
them the option to turn this on or off instead of forcing them to always 
use unfair lock in a PV guest.

-Longman
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