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

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Message-ID: <CAOJsxLEGnpuwmrhO0QJFuOoh5itYFyphtyg+VGH0qdrGH=8zYw@mail.gmail.com>
Date:	Fri, 28 Oct 2011 20:01:43 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Johannes Weiner <jweiner@...hat.com>
Cc:	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Cyclonus J <cyclonusj@...il.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Christoph Hellwig <hch@...radead.org>,
	David Rientjes <rientjes@...gle.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Konrad Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Seth Jennings <sjenning@...ux.vnet.ibm.com>, ngupta@...are.org,
	Chris Mason <chris.mason@...cle.com>, JBeulich@...ell.com,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [GIT PULL] mm: frontswap (for 3.2 window)

On Fri, Oct 28, 2011 at 7:30 PM, Johannes Weiner <jweiner@...hat.com> wrote:
> People did look at it.
>
> In my case, the handwavy benefits did not convince me.  The handwavy
> 'this is useful' from just more people of the same company does not
> help, either.
>
> I want to see a usecase that tangibly gains from this, not just more
> marketing material.  Then we can talk about boring infrastructure and
> adding hooks to the VM.
>
> Convincing the development community of the problem you are trying to
> solve is the undocumented part of the process you fail to follow.

Indeed. I don't also understand why this is useful nor am I convinced
enough to actually try to figure out how to do the swapfile hooks
cleanly.

                          Pekka
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