linux-kernel - Re: [PATCH 0/7] ksm: responses to NUMA review

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Message-ID: <51296F49.40103@gmail.com>
Date:	Sun, 24 Feb 2013 09:39:21 +0800
From:	Ric Mason <ric.masonn@...il.com>
To:	Hugh Dickins <hughd@...gle.com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mgorman@...e.de>,
	Petr Holasek <pholasek@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Izik Eidus <izik.eidus@...ellosystems.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 0/7] ksm: responses to NUMA review

On 02/23/2013 04:38 AM, Hugh Dickins wrote:
> On Fri, 22 Feb 2013, Ric Mason wrote:
>> On 02/21/2013 04:17 PM, Hugh Dickins wrote:
>>> Here's a second KSM series, based on mmotm 2013-02-19-17-20: partly in
>>> response to Mel's review feedback, partly fixes to issues that I found
>>> myself in doing more review and testing.  None of the issues fixed are
>>> truly show-stoppers, though I would prefer them fixed sooner than later.
>> Do you have any ideas ksm support page cache and tmpfs?
> No.  It's only been asked as a hypothetical question: I don't know of
> anyone actually needing it, and I wouldn't have time to do it myself.
>
> It would be significantly more invasive than just dealing with anonymous
> memory: with anon, we already have the infrastructure for read-only pages,
> but we don't at present have any notion of read-only pagecache.
>
> Just doing it in tmpfs?  Well, yes, that might be easier: since v3.1's
> radix_tree rework, shmem/tmpfs mostly goes through its own interfaces
> to pagecache, so read-only pagecache, and hence KSM, might be easier
> to implement there than more generally.

Ok, are there potential users to take advantage of it?

>
> Hugh

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