Messages in this thread | | | Date | Thu, 31 Jul 2014 13:38:51 -0700 | From | Saravana Kannan <> | Subject | Re: [PATCH] cpufreq, store_scaling_governor requires policy->rwsem to be held for duration of changing governors [v2] |
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On 07/31/2014 01:30 PM, Prarit Bhargava wrote: > > > On 07/31/2014 04:24 PM, Saravana Kannan wrote: >> >> Prarit, >> >> I'm not an expert on sysfs locking, but I would think the specific sysfs lock >> would depend on the file/attribute group. So, can you please try to hotplug a >> core in/out (to trigger the POLICY_EXIT) and then read a sysfs file exported by >> the governor? scaling_governor doesn't cut it since that file is not removed on >> policy exit event to governor. If it's ondemand, try reading/write it's sampling >> rate file. > > Thanks Saravana -- will do. I will get back to you shortly on this. >
Thanks. Btw, in case you weren't already aware of it. You'll have to hoplug out all the CPUs in a cluster to trigger a POLICY_EXIT for that cluster/policy.
-Saravana
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