Re: [RFC PATCH] cpuidle: allow per cpu latencies

From: Daniel Lezcano
Date: Thu Apr 19 2012 - 05:14:41 EST

On 04/16/2012 05:34 PM, Peter De Schrijver wrote:

Maybe we also want to make the 'disabled' flag per CPU then or provide some
other way the number of C states can be different per CPU?

What do you think about this? Do we also want to make the disabled flag per
CPU? Or how should we deal with a different number of C states per CPU?

Hi Peter,

yes, that could makes sense. But in most of the architecture, this is not needed, so duplicating the state's array and latencies is unneeded memory consumption.

Maybe we can look for a COW approach, similar to what is done for the nsproxy structure, no ?

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