linux-kernel - Re: Swappiness vs. mmap() and interactive response

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Message-Id: <20090428170214.EBD8.A69D9226@jp.fujitsu.com>
Date:	Tue, 28 Apr 2009 17:03:09 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	kosaki.motohiro@...fujitsu.com, Elladan <elladan@...imo.com>,
	linux-kernel@...r.kernel.org, linux-mm <linux-mm@...ck.org>,
	Rik van Riel <riel@...hat.com>
Subject: Re: Swappiness vs. mmap() and interactive response

> > 1. please post your /proc/meminfo
> > 2. Do above copy make tons swap-out? IOW your disk read much faster than write?
> > 3. cache limitation of memcgroup solve this problem?
> > 4. Which disk have your /bin and /usr/bin?
> > 
> 
> FWIW I fundamentally object to 3 as being a solution.

Yes, I also think so.


> I still think the idea of read-ahead driven drop-behind is a good one,
> alas last time we brought that up people thought differently.

hmm.
sorry, I can't recall this patch. do you have any pointer or url?



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