linux-kernel - Re: [PATCH 1/2] [mmotm] Add notifiers for various swap events

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Message-ID: <20091228172903.GF4994@basil.fritz.box>
Date:	Mon, 28 Dec 2009 18:29:03 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Nitin Gupta <ngupta@...are.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Hugh Dickins <hugh.dickins@...cali.co.uk>,
	Pekka Enberg <penberg@...helsinki.fi>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] [mmotm] Add notifiers for various swap events

> > The first question to ask is if compressed swap is worth
> > it. Do you have benchmark numbers showing it to be an improvement?
> > Are there cases where it is slower than uncompressed swap?
> > 
> 
> http://code.google.com/p/compcache/wiki/Performance

That should be included in the changelog of the patches.

> ramzswap is an optional module.

I have some doubts on the wisdom of making swap algorithms modular.
Better compile them in. Then you don't need messy notifiers either.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only.
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