All of lore.kernel.org
 help / color / mirror / Atom feed
From: Stephen Warren <swarren@wwwdotorg.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Viresh Kumar <viresh.kumar@linaro.org>,
	"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>
Subject: Re: cpufreq regression due to dceff5c "cpufreq: fix serialization issues with freq change notifiers"
Date: Wed, 11 Sep 2013 16:53:31 -0600	[thread overview]
Message-ID: <5230F46B.7070006@wwwdotorg.org> (raw)
In-Reply-To: <13389782.ui3WXEBqQV@vostro.rjw.lan>

On 09/11/2013 04:51 PM, Rafael J. Wysocki wrote:
> On Wednesday, September 11, 2013 04:20:36 PM Stephen Warren wrote:
>> One of the test cases I run (not often enough, hence I just noticed this
>> late) is the following, to make sure our cpufreq driver is present, and
>> adjusting the CPU clock as expected:
>>
>> # echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq ;
>> sleep 1 ; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq ;
>> echo 216000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq  ;
>> sleep 1 ; cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
>>
>> which prints the following when it works:
>>
>> 1000000
>> 216000
>>
>> In next-20130909, that doesn't work, but instead prints:
>>
>> 216000
>> 216000
>>
>> I've also seen the following during git bisect:
>>
>> 608000
>> 608000
>>
>> ... and perhaps other unexpected sets of values.
> 
> Can you please test the current linux-next?  I've reverted the commit that
> dceff5c attempted to fix, so the output should be correct now.

Yes, indeed next-20130911 works fine. Thanks, and sorry for the noise.

  reply	other threads:[~2013-09-11 22:53 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-11 22:20 cpufreq regression due to dceff5c "cpufreq: fix serialization issues with freq change notifiers" Stephen Warren
2013-09-11 22:51 ` Rafael J. Wysocki
2013-09-11 22:53   ` Stephen Warren [this message]
2013-09-12  0:18     ` Rafael J. Wysocki
2013-09-12  0:26     ` Viresh Kumar
2013-09-12  0:31       ` Viresh Kumar
2013-09-12 16:27         ` Stephen Warren
2013-09-13  4:21           ` Viresh Kumar

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5230F46B.7070006@wwwdotorg.org \
    --to=swarren@wwwdotorg.org \
    --cc=linux-pm@vger.kernel.org \
    --cc=rjw@sisk.pl \
    --cc=viresh.kumar@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.