linux-kernel - Re: fadvise DONTNEED implementation (or lack thereof)

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Message-Id: <20101115160413.BF0F.A69D9226@jp.fujitsu.com>
Date:	Mon, 15 Nov 2010 16:09:37 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Minchan Kim <minchan.kim@...il.com>
Cc:	kosaki.motohiro@...fujitsu.com,
	Ben Gamari <bgamari.foss@...il.com>,
	linux-kernel@...r.kernel.org, rsync@...ts.samba.org,
	linux-mm@...ck.org, Peter Zijlstra <peterz@...radead.org>,
	Wu Fengguang <fengguang.wu@...el.com>
Subject: Re: fadvise DONTNEED implementation (or lack thereof)

> > Because we have an alternative solution already. please try memcgroup :)
> 
> I think memcg could be a solution of them but fundamental solution is
> that we have to cure it in VM itself.
> I feel it's absolutely absurd to enable and use memcg for amending it.
> 
> I wonder what's the problem in Peter's patch 'drop behind'.
> http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg179576.html
> 
> Could anyone tell me why it can't accept upstream?

I don't know the reason. And this one looks reasonable to me. I'm curious the above 
patch solve rsync issue or not. 
Minchan, have you tested it yourself?


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