linux-kernel - RE: [PATCH] vmevent: Use 'struct vmevent_attr' for vmevent

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Date:	Wed, 7 Mar 2012 12:03:20 +0200 (EET)
From:	Pekka Enberg <penberg@...nel.org>
To:	leonid.moiseichuk@...ia.com
cc:	anton.vorontsov@...aro.org, linux-kernel@...r.kernel.org,
	rientjes@...gle.com
Subject: RE: [PATCH] vmevent: Use 'struct vmevent_attr' for vmevent_fd()
 ABI

On Wed, 7 Mar 2012, leonid.moiseichuk@...ia.com wrote:
> > -----Original Message-----
> > From: ext Anton Vorontsov [mailto:anton.vorontsov@...aro.org]
> > Sent: 07 March, 2012 01:00
> > To: Pekka Enberg
> > Cc: linux-kernel@...r.kernel.org; Moiseichuk Leonid (Nokia-MP/Espoo);
> ...
> > Sorry for hijacking this thread, but speaking of big changes. Are there any
> > plans or ideas to add other methods of sampling, i.e. something not timer-
> > based?
> ...
> > Though, current vmevent seems not so lightweigh in sense of battery usage
> > and accuracy (i.e. how quick we're able to detect the crossed threshold). To
> > get better accuracy we would need to run timer at higher frequencies, but
> > then we would waste more battery.
> 
> One of patch I sent was about switching to deferred timer. This API should not be 100% accurate first, and using deferred
> timers will allow to sleep properly when system has no activity. I hope Pekka will accept the next patch as well.

I merged that patch yesterday:

http://git.kernel.org/?p=linux/kernel/git/penberg/linux.git;a=commitdiff;h=7d5e14c4b0421f7716e759934c0c2524b1d763ea

			Pekka
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