From: Saravana Kannan <skannan@codeaurora.org>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael Wysocki <rjw@rjwysocki.net>,
linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 4/5] cpufreq: create cpu/cpufreq/policyX directories
Date: Thu, 15 Oct 2015 12:28:10 -0700 [thread overview]
Message-ID: <561FFE4A.5070103@codeaurora.org> (raw)
In-Reply-To: <20151015065503.GB19018@linux>
On 10/14/2015 11:55 PM, Viresh Kumar wrote:
> On 13-10-15, 12:29, Saravana Kannan wrote:
>> But we don't need to track track of "present-cpus" separately
>> though. We could do the for_each_cpu_and() when we create the
>> symlinks for the first time. And after that, we can just use the
>> subsystem interface callbacks (cpufreq_add_dev() and
>> cpufreq_remove_dev()) to keep the symlinks updated.
>>
>> I don't see any place where keeping track of this separately is more
>> efficient. This would save some memory savings when the number of
>> CPUs is large and also simplify the code because we won't have to
>> keep another field up to date.
>
> It is still required to track when can we free the policy.
>
Ok, I'm not very familiar with this new field's uses. I'll take a closer
look later and respond if I have other thoughts.
Thanks,
Saravana
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
next prev parent reply other threads:[~2015-10-15 19:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-11 17:21 [PATCH 0/5] cpufreq: sysfs cleanup Viresh Kumar
2015-10-11 17:21 ` [PATCH 1/5] cpufreq: Use cpumask_copy instead of cpumask_or to copy a mask Viresh Kumar
2015-10-12 19:12 ` Saravana Kannan
2015-10-13 3:23 ` Viresh Kumar
2015-10-13 19:22 ` Saravana Kannan
2015-10-11 17:21 ` [PATCH 2/5] cpufreq: create cpu/cpufreq at boot time Viresh Kumar
2015-10-11 17:21 ` [PATCH 3/5] cpufreq: remove cpufreq_sysfs_{create|remove}_file() Viresh Kumar
2015-10-11 17:21 ` [PATCH 4/5] cpufreq: create cpu/cpufreq/policyX directories Viresh Kumar
2015-10-12 19:31 ` Saravana Kannan
2015-10-13 3:39 ` Viresh Kumar
2015-10-13 19:29 ` Saravana Kannan
2015-10-15 6:55 ` Viresh Kumar
2015-10-15 19:28 ` Saravana Kannan [this message]
2015-10-13 6:15 ` Viresh Kumar
2015-10-13 19:25 ` Saravana Kannan
2015-10-11 17:21 ` [PATCH 5/5] cpufreq: Drop redundant check for inactive policies Viresh Kumar
2015-10-12 19:35 ` Saravana Kannan
2015-10-13 6:05 ` Viresh Kumar
2015-10-11 19:57 ` [PATCH 0/5] cpufreq: sysfs cleanup Doug Smythies
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