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From: Jonathan Nieder <jrnieder@gmail.com>
To: Dave Jones <davej@redhat.com>
Cc: cpufreq@vger.kernel.org, linux-kernel@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@sisk.pl>,
	Nicolas Pitre <nicolas.pitre@linaro.org>,
	Russell King - ARM Linux <linux@arm.linux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>, Tony Lindgren <tony@atomide.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Mark Brown <broonie@opensource.wolfsonmicro.com>,
	Mattia Dongili <malattia@debian.org>
Subject: Re: [BUG?] Moving drivers to drivers/cpufreq/ causes all to be loaded
Date: Sat, 13 Aug 2011 14:02:46 -0500	[thread overview]
Message-ID: <20110813190246.GA10412@elie.gateway.2wire.net> (raw)
In-Reply-To: <20110813154638.GA1494@elie.gateway.2wire.net>

Jonathan Nieder wrote:

>  (1) This is still incredibly fragile.  What *should* cpufrequtils
>      be doing to get the modules it needs?
>
>  (2) Using the 3.0 or later kernel with old userspace gives bad
>      results (e.g., 30% increase in power consumption for one
>      reporter).  That's a regression.

The "30% increase" part was an unrelated bug (i915.i915_enable_rc6=1
brings power consumption back to normal), for those who were
wondering. :)

Old userspace automatically loading the wrong cpufreq drivers still
does not seem great to me, though I don't have any great ideas about
how to prevent that (a separate drivers/cpufreq-drivers/ directory
does not sound too appealing).  I guess I'd be most interested in how
to fix (1) first.

Thanks,
Jonathan

  reply	other threads:[~2011-08-13 19:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20110414094447.GA1611@n2100.arm.linux.org.uk>
     [not found] ` <alpine.LFD.2.00.1104211629300.24613@xanadu.home>
     [not found]   ` <201104261605.26791.arnd@arndb.de>
     [not found]     ` <201104261904.45923.rjw@sisk.pl>
     [not found]       ` <20110426181508.GB1908@redhat.com>
2011-08-13 15:46         ` Jonathan Nieder
2011-08-13 19:02           ` Jonathan Nieder [this message]
2011-08-13 21:11             ` Dave Jones
2011-08-14  0:18               ` Mattia Dongili
2011-08-14 17:01               ` Jonathan Nieder
2011-08-14 17:17                 ` Kay Sievers

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