linux-kernel - Re: [linux-pm] [PATCH] PM / QoS: unconditionally build the feature

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Message-Id: <201202172148.32168.rjw@sisk.pl>
Date:	Fri, 17 Feb 2012 21:48:32 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Pavel Machek <pavel@....cz>
Cc:	Jean Pihet <jean.pihet@...oldbits.com>,
	Venkatesh Pallipadi <venki@...gle.com>,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	Jean Pihet <j-pihet@...com>, linux-kernel@...r.kernel.org,
	Mark Gross <markgross@...gnar.org>
Subject: Re: [linux-pm] [PATCH] PM / QoS: unconditionally build the feature

On Friday, February 17, 2012, Pavel Machek wrote:
> On Mon 2012-02-13 16:41:10, Rafael J. Wysocki wrote:
> > On Monday, February 13, 2012, Jean Pihet wrote:
> > > The PM QoS feature depends on CONFIG_PM which depends on
> > > PM_SLEEP || PM_RUNTIME. This breaks CPU C-states with kernels
> > > not having these CONFIGs.
> > > 
> > > This patch allows the feature in all cases.
> > > 
> > > Signed-off-by: Jean Pihet <j-pihet@...com>
> > > Reported-by: Venkatesh Pallipadi <venki@...gle.com>
> > > Cc: Rafael J. Wysocki <rjw@...k.pl>
> > > Cc: Mark Gross <markgross@...gnar.org>
> > 
> > Applied, but I modified the changelog (please have a look at the
> > linux-pm/pm-qos branch for details).
> 
> Is it good idea? For servers, power management / QoS is not
> neccessary... 

Yes, it is.  They surely use CPUidle.

Thanks,
Rafael
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