linux-kernel - Re: [PATCH 3/3] vmevent: Implement special low-memory attribute

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Message-ID: <CAOJsxLGGCq7czaBBO0POeWoh77ne5EXGs1+dxuSp1rj3Leydiw@mail.gmail.com>
Date:	Tue, 8 May 2012 12:27:40 +0300
From:	Pekka Enberg <penberg@...nel.org>
To:	Minchan Kim <minchan@...nel.org>
Cc:	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Leonid Moiseichuk <leonid.moiseichuk@...ia.com>,
	John Stultz <john.stultz@...aro.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linaro-kernel@...ts.linaro.org,
	patches@...aro.org, kernel-team@...roid.com
Subject: Re: [PATCH 3/3] vmevent: Implement special low-memory attribute

On Tue, May 8, 2012 at 11:32 AM, Minchan Kim <minchan@...nel.org> wrote:
> The idea is that we can make some levels in advane and explain it to user
>
> Level 1: It a immediate response to user when kernel decide there are not fast-reclaimable pages any more.
> Level 2: It's rather slower response than level 1 but kernel will consider it as reclaimable target
> Level 3: It's slowest response because kernel will consider page needed long time to reclaim as reclaimable target.
>
> It doesn't expose any internal of kernel and can implment it in internal.
> For simple example,
>
> Level 1: non-mapped clean page
> Level 2: Level 1 + mapped clean-page
> Level 3: Level 2 + dirty pages
>
> So users of vmevent_fd can select his level.

I'm totally OK with pursuing something like this if people like Leonid
and Anton think it's useful for their use-cases.
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