linux-kernel - Re: [PATCH] RFC: vmscan: add min_filelist_kbytes sysctl for protecting the working set

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Message-Id: <20101109115118.BC3C.A69D9226@jp.fujitsu.com>
Date:	Tue,  9 Nov 2010 11:53:09 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Mandeep Singh Baines <msb@...omium.org>
Cc:	kosaki.motohiro@...fujitsu.com,
	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mel@....ul.ie>,
	Johannes Weiner <hannes@...xchg.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org, wad@...omium.org,
	olofj@...omium.org, hughd@...omium.org
Subject: Re: [PATCH] RFC: vmscan: add min_filelist_kbytes sysctl for protecting the working set

> > I don't think current VM behavior has a problem.
> > Current problem is that you use up many memory than real memory.
> > As system memory without swap is low, VM doesn't have a many choice.
> > It ends up evict your working set to meet for user request. It's very
> > natural result for greedy user.
> > 
> > Rather than OOM notifier, what we need is memory notifier.
> > AFAIR, before some years ago, KOSAKI tried similar thing .
> > http://lwn.net/Articles/268732/
> 
> Thanks! This is perfect. I wonder why its not merged. Was a different
> solution eventually implemented? Is there another way of doing the
> same thing?

Now memcg has memory threshold notification feature and almost people
are using it. If you think notification fit your case, can you please
try this feature at first?
And if it doesn't fit your case and we will get a feedback from you, 
we probably can extend such one.

Thanks.


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