linux-kernel - Re: [PATCH v6 0/5] ACPI / processor

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 25 Jun 2016 02:23:16 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Sudeep Holla <sudeep.holla@....com>
Cc:	linux-acpi@...r.kernel.org,
	Vikas Sajjan <vikas.cha.sajjan@....com>,
	Sunil <sunil.vl@....com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Prashanth Prakash <pprakash@...eaurora.org>,
	Al Stone <al.stone@...aro.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 0/5] ACPI / processor_idle: Add ACPI v6.0 LPI support

On Thursday, June 23, 2016 02:42:57 AM Rafael J. Wysocki wrote:
> On Wednesday, June 22, 2016 06:45:15 PM Sudeep Holla wrote:
> > Hi Rafael,
> > 
> > On 14/06/16 15:48, 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.
> > >
> > > This series aims at providing basic and initial support for platform
> > > coordinated LPI states.
> > >
> > 
> > Gentle ping, was hoping to target this series for v4.8
> 
> On my list of things to take care of this week.  But this is a long list ...

Well, there are comments from Lorenzo and Daniel that need addressing,
so can you please do that and resend?

Thanks,
Rafael