Re: [PATCH 2/2] pm_qos: make update_request callable from interruptcontext

From: Thomas Gleixner
Date: Wed Jun 09 2010 - 05:47:28 EST

On Wed, 9 Jun 2010, florian@xxxxxxxxxxx wrote:

> The pm_qos framework has to guarantee atomic notifications so that
> drivers can request and release constraints at all times while no races
> occur.
> In order to avoid implementing a secondary notification chain in which
> listeners might sleep, we demand that every listener implements it's
> notification so that it can run in interrupt context. The listener is in
> a better position to know if races are harmful or not.

That breaks existing notifiers.


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