linux-kernel - RE: [GIT PULL] mm: frontswap (for 3.2 window)

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Message-ID: <82d2f082-6ab1-479e-bbf9-f04992804420@default>
Date:	Tue, 1 Nov 2011 15:25:14 -0700 (PDT)
From:	Dan Magenheimer <dan.magenheimer@...cle.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
	Konrad Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>, ngupta@...are.org,
	levinsasha928@...il.com, Chris Mason <chris.mason@...cle.com>,
	JBeulich@...ell.com, Dave Hansen <dave@...ux.vnet.ibm.com>,
	Jonathan Corbet <corbet@....net>, Neo Jia <cyclonusj@...il.com>
Subject: RE: [GIT PULL] mm: frontswap (for 3.2 window)

> From: Andrew Morton [mailto:akpm@...ux-foundation.org]
> Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window)
> 
> On Tue, 1 Nov 2011 08:25:38 -0700 (PDT)
> Dan Magenheimer <dan.magenheimer@...cle.com> wrote:
> 
> At kernel summit there was discussion and overall agreement that we've
> been paying insufficient attention to the big-picture "should we
> include this feature at all" issues.  We resolved to look more
> intensely and critically at new features with a view to deciding
> whether their usefulness justified their maintenance burden.  It seems
> that you're our crash-test dummy ;) (Now I'm wondering how to get
> "cgroups: add a task counter subsystem" put through the same wringer).
> 
> I will confess to and apologise for dropping the ball on cleancache and
> frontswap.  I was never really able to convince myself that it met the
> (very vague) cost/benefit test, but nor was I able to present
> convincing arguments that it failed that test.  So I very badly went
> into hiding, to wait and see what happened.  What we needed all those
> months ago was to have the discussion we're having now.
> 
> This is a difficult discussion and a difficult decision.  But it is
> important that we get it right.  Thanks for you patience.

Thanks very much for your very kind response.  Let me know if
I can do anything else to help the process other than continuing
the discussion of course.  I'll be happy to help as soon as
I return from the crash-test-dummy hospital ;-)

Dan
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