From: Pei Lin <telent997@gmail.com>
To: Mulyadi Santosa <mulyadi.santosa@gmail.com>
Cc: Ryan Wang <openspace.wang@gmail.com>,
kernelnewbies@nl.linux.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: question about CONFIG_BASE_SMALL
Date: Thu, 5 Aug 2010 09:10:21 +0800 [thread overview]
Message-ID: <AANLkTi=5Ks0jmnGgUzH_gPEt36KPK7mwfdMscw8yTPmc@mail.gmail.com> (raw)
In-Reply-To: <AANLkTimejYX3OEk9j+L+nWKyBuf7=rJbAOvQGhxJNPxN@mail.gmail.com>
2010/8/4 Mulyadi Santosa <mulyadi.santosa@gmail.com>:
> Hi...
>
> On Wed, Aug 4, 2010 at 15:38, Ryan Wang <openspace.wang@gmail.com> wrote:
>> Hi all,
>>
>> I noticed CONFIG_BASE_SMALL in different parts
>> of the kernel code, with ifdef/ifndef.
>> I wonder what does CONFIG_BASE_SMALL mean?
>> And how can I configure it, e.g. through make menuconfig?
>
> Reply on top of my head: IIRC it means to disable certain things...or
> possibly enabling things that might reduce memory footprints.
>
> The goal....to make Linux kernel running more suitable for embedded
> system and low level specification machine...
>
FYI.
Date: Mon, 31 Jan 2005 01:25:51 -0600
To: Andrew Morton <akpm@osdl.org>
This patch series introduced a new pair of CONFIG_EMBEDDED options call
CONFIG_BASE_FULL/CONFIG_BASE_SMALL. Disabling CONFIG_BASE_FULL sets
the boolean CONFIG_BASE_SMALL to 1 and it is used to shrink a number
of core data structures. The space savings for the current batch is
around 14k.
-
For example , look at the file "Linux/include/linux/udp.h"
http://lxr.free-electrons.com/source/include/linux/udp.h
#define UDP_HTABLE_SIZE_MIN (CONFIG_BASE_SMALL ? 128 : 256)
> --
> regards,
>
> Mulyadi Santosa
> Freelance Linux trainer and consultant
>
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
> --
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--
Best Regards
Lin
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prev parent reply other threads:[~2010-08-05 1:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-04 8:38 Ryan Wang
2010-08-04 8:59 ` Yong Zhang
2010-08-04 9:14 ` Mulyadi Santosa
2010-08-05 1:10 ` Pei Lin [this message]
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