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Date:	Thu, 7 Aug 2014 06:04:25 -0000
To:	"Rafael J. Wysocki" <>
Cc:	"Saravana Kannan" <>,
	"Viresh Kumar" <>,
	"Todd Poynor" <>,
	"Srivatsa S . Bhat" <>,,,,,
	"Stephen Boyd" <>
Subject: Re: [PATCH v4 0/5] Simplify hotplug/suspend handling

Rafael J. Wysocki wrote:
> On Thursday, July 24, 2014 06:07:23 PM Saravana Kannan wrote:
>> Series of patchs to simplify policy/sysfs/kobj/locking handling across
>> suspend/resume
> I need someone to review this series for me.  Viresh or Srivatsa,
> preferably
> both.
> Thanks!

This took quite a bit of work to get to v4. It's been almost 2 weeks.
Could someone please review this? I'll get pulled into some heavy "work"
work soon. I would really prefer not to let this bit rot and later
abandoned due to lack of time on my part. Would really appreciate some
review folks. Thanks.


>> The following have been tested so far on a 2x2 cluster environment:
>> - Boot with 2 cpus and no cpufreq driver.
>> - mod probe driver and see cpufreq sysfs files show up only for the 1st
>> cluster.
>> - Online the rest of the 2 CPUs and have files show up correctly.
>> - rmmod the driver and see the files go away.
>> - modprobe again (or back and forth multiples times) and see it work.
>> - suspend/resume works as expected.
>> - When a cluster is offline, all read/writes to its sysfs files return
>> an error
>> v4
>> - Split it up into smaller patches
>> - Will handle physical CPU removal correctly
>> - Fixed earlier mistake of deleting code under !recover_policy
>> - Dropped some code refactor that reuses a lot of code between
>> add/remove
>> - Dropped fix for exiting hotplug race with cpufreq driver probe/rmmod
>> - Dropped changes will come later once this series is acked.
>> Saravana Kannan (5):
>>   cpufreq: Don't wait for CPU to going offline to restart governor
>>   cpufreq: Keep track of which CPU owns the kobj/sysfs nodes separately
>>   cpufreq: Don't destroy/realloc policy/sysfs on hotplug/suspend
>>   cpufreq: Properly handle physical CPU hot-add/hot-remove
>>   cpufreq: Delete dead code related to policy save/restore
>>  drivers/cpufreq/cpufreq.c | 238
>> ++++++++++++++++++----------------------------
>>  include/linux/cpufreq.h   |   1 +
>>  2 files changed, 93 insertions(+), 146 deletions(-)
> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.

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