linux-kernel - Re: [PATCH] mm: check zone->all_unreclaimable in all

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Message-Id: <20110309144353.387d946e.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Wed, 9 Mar 2011 14:43:53 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrew Vagin <avagin@...il.com>,
	Andrey Vagin <avagin@...nvz.org>, Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: check zone->all_unreclaimable in
 all_unreclaimable()

On Wed, 9 Mar 2011 14:37:04 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> On Tue, 8 Mar 2011 08:45:51 +0900
> Minchan Kim <minchan.kim@...il.com> wrote:
> Hmm, should I support a sacrifice feature 'some signal(SIGINT?) will be sent by
> the kernel when it detects system memory is in short' in cgroup ?
> (For example, if full LRU scan is done in a zone, notifier
>  works and SIGINT will be sent.)
> 

Sorry, this sounds like  "mem_notify" ;), Kosaki-san's old work.

I think functionality for "mem_notify" will have no obstacle opinion but
implementation detail is a problem....Shouldn't we try it again ?

Thanks,
-Kame

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