linux-kernel - Re: [PATCH 10/12] ksm: sysfs and defaults

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Message-ID: <4A788D32.1090300@redhat.com>
Date:	Tue, 04 Aug 2009 22:34:10 +0300
From:	Izik Eidus <ieidus@...hat.com>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
CC:	Andrea Arcangeli <aarcange@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Chris Wright <chrisw@...hat.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH 10/12] ksm: sysfs and defaults

Hugh Dickins wrote:
> At present KSM is just a waste of space if you don't have CONFIG_SYSFS=y
> to provide the /sys/kernel/mm/ksm files to tune and activate it.
>
> Make KSM depend on SYSFS?  Could do, but it might be better to provide
> some defaults so that KSM works out-of-the-box, ready for testers to
> madvise MADV_MERGEABLE, even without SYSFS.
>
> Though anyone serious is likely to want to retune the numbers to their
> taste once they have experience; and whether these settings ever reach
> 2.6.32 can be discussed along the way.  
>
> Save 1kB from tiny kernels by #ifdef'ing the SYSFS side of it.
>
> Signed-off-by: Hugh Dickins <hugh.dickins@...cali.co.uk>
> ---
>   

Acked-By: Izik Eidus <ieidus@...hat.com>
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