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

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Message-ID: <alpine.LFD.2.02.1203071203320.1774@tux.localdomain>
Date:	Wed, 7 Mar 2012 12:08:19 +0200 (EET)
From:	Pekka Enberg <penberg@...nel.org>
To:	Anton Vorontsov <anton.vorontsov@...aro.org>
cc:	linux-kernel@...r.kernel.org, leonid.moiseichuk@...ia.com,
	David Rientjes <rientjes@...gle.com>, mingo@...e.hu
Subject: Re: [PATCH] vmevent: Use 'struct vmevent_attr' for vmevent_fd()
 ABI

On Wed, 7 Mar 2012, Anton Vorontsov wrote:
> 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?

Yes and no.

Linux already has non-timer based "vm events" via tracepoints. There's 
absolutely no need to reinvent the wheel so we should integrate with perf 
more closely.

The biggest open question is whether or not a new syscall is needed for 
configuring memory thresholds and such.

			Pekka
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