linux-kernel - Re: [patch 0/5] refault distance-based file cache sizing

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Message-ID: <4FB66B31.3020509@gmail.com>
Date:	Fri, 18 May 2012 23:30:57 +0800
From:	Nai Xia <nai.xia@...il.com>
To:	Rik van Riel <riel@...hat.com>
CC:	Johannes Weiner <hannes@...xchg.org>, linux-mm@...ck.org,
	Andrea Arcangeli <aarcange@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Hugh Dickins <hughd@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [patch 0/5] refault distance-based file cache sizing



On 2012年05月18日 23:07, Rik van Riel wrote:
> On 05/17/2012 11:44 PM, Nai Xia wrote:
>
>> But I do think that Clock-pro deserves its credit, since after all
>> it's that research work firstly brought the idea of "refault/reuse
>> distance" to the kernel community.
>
> The ARC people did that, too.

Well, I think you said "take the good parts of clock-pro"...
Anyway, then I think you should credit either of the previous
works... :D

>
>> Further more, it's also good
>> to let the researchers and the community to together have some
>> brain-storm of this problem if it's really hard to deal with in
>> reality.
>
> How much are researchers interested in the real world
> constraints that OS developers have to deal with?

I think there will be nobody, if we don't try to let them
know about the constraints. Honestly, LKML are hard for
researchers to follow. They really need abstract view of
a problem. Surely there is a gap...between researchers and
developers.

>
> Often scalability is as much of a goal as being good
> at selecting the right page to replace...
>
Then scalability might be a good research topic as long
as they have the chance to understand the details.

Ok, all I want to say is another way that may help
the kernel world better. I am actually quite positive
about the patch itself.
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