RE: [PATCH 2/5] vmevent: Convert from deferred timer to deferredwork

[leonid.moiseichuk]

> -----Original Message-----
> From: ext KOSAKI Motohiro [mailto:kosaki.motohiro@xxxxxxxxx]
> Sent: 08 June, 2012 10:33
> To: Moiseichuk Leonid (Nokia-MP/Espoo)
.. 
> Wrong. CPU don't realized the running code belong to userspace or kernel.
> Every code just consume a power. That's why polling timer is wrong from
> point of power consumption view.
???
We are talking about different things.
User-space code could be dropped, distributed between several applications and has not deferred timers support.
For polling API the user-space code has to be executed quite often.
Localizing this code in kernel additionally allows to avoid vmsat/meminfo generation and parsing overhead as well.
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