Re: [PATCH v9 0/7] ACPI / processor_idle: Add ACPI v6.0 LPI support

[Sudeep Holla]

On 12/07/16 13:09, Rafael J. Wysocki wrote:
> On Tuesday, July 12, 2016 12:42:06 PM Sudeep Holla wrote:
> > On 08/07/16 18:07, Sudeep Holla wrote:
> > > ACPI 6.0 introduced LPI(Low Power Idle) states that provides an alternate
> > > method to describe processor idle states. It extends the specification
> > > to allow the expression of idle states like C-states selectable by the
> > > OSPM when a processor goes idle, but may affect more than one processor,
> > > and may affect other system components.
> > >
> > > LPI extensions leverages the processor container device(again introduced
> > > in ACPI 6.0) allowing to express which parts of the system are affected
> > > by a given LPI state. It defines the local power states for each node
> > > in a hierarchical processor topology. The OSPM can use _LPI object to
> > > select a local power state for each level of processor hierarchy in the
> > > system. They used to produce a composite power state request that is
> > > presented to the platform by the OSPM.
> > >
> > > Since multiple processors affect the idle state for any non-leaf hierarchy
> > > node, coordination of idle state requests between the processors is
> > > required. ACPI supports two different coordination schemes: Platform
> > > coordinated and  OS initiated.
> >
> > I was hoping to get this in v4.8 now that merge window is
> > delayed/extended if you have no further comments on this series.
>
> I'll get to it in the next couple of days.  If it looks all good and there are
> no comments, I'll queue it up.

Thanks for the update.

--
Regards,
Sudeep