From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <scottwood@freescale.com>
Received: from az33egw02.freescale.net (az33egw02.freescale.net
	[192.88.158.103])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(Client CN "az33egw02.freescale.net",
	Issuer "Thawte Premium Server CA" (verified OK))
	by bilbo.ozlabs.org (Postfix) with ESMTPS id A726FB7085
	for <linuxppc-dev@lists.ozlabs.org>;
	Tue,  7 Jul 2009 04:38:30 +1000 (EST)
Message-ID: <4A5244B6.7030800@freescale.com>
Date: Mon, 06 Jul 2009 13:38:46 -0500
From: Scott Wood <scottwood@freescale.com>
MIME-Version: 1.0
To: Mikhail Zaturenskiy <mzaturenskiy.st@gmail.com>
Subject: Re: RAMDISK on EP88xc
References: <97dd5fd20907011104t773c3fc9tca7f0fe56ea22477@mail.gmail.com>
	<97dd5fd20907011314j1974728fs745bbc62e2b1e6ec@mail.gmail.com>
	<1ba63b520907020010u46a3b495h79672fc4f6d84c14@mail.gmail.com>
	<97dd5fd20907020643s52cc65aah8ee315c3592d5e1@mail.gmail.com>
	<4A4CBC0C.1040001@mlbassoc.com>
	<97dd5fd20907020927v2680a7f8m2657193394bd6323@mail.gmail.com>
	<97dd5fd20907021142i663de6aavc093fbd6ac5025c@mail.gmail.com>
	<1ba63b520907021338n3c0d6d33g11d4934ccc538a94@mail.gmail.com>
	<97dd5fd20907021438ve8c72b9g168e4aa22e9f2f9f@mail.gmail.com>
	<4A4D2B70.1030505@freescale.com>
	<97dd5fd20907061129k67d2404m7e2a2c8fd8a71503@mail.gmail.com>
In-Reply-To: <97dd5fd20907061129k67d2404m7e2a2c8fd8a71503@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Cc: linuxppc-dev@lists.ozlabs.org
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.lists.ozlabs.org>
List-Unsubscribe: <https://lists.ozlabs.org/options/linuxppc-dev>,
	<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=unsubscribe>
List-Archive: <http://lists.ozlabs.org/pipermail/linuxppc-dev>
List-Post: <mailto:linuxppc-dev@lists.ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@lists.ozlabs.org?subject=help>
List-Subscribe: <https://lists.ozlabs.org/listinfo/linuxppc-dev>,
	<mailto:linuxppc-dev-request@lists.ozlabs.org?subject=subscribe>

Mikhail Zaturenskiy wrote:
>> If you have time, could you bisect to see when the slowdown was introduced?
>>
>> -Scott
>>
> 
> Scott, I tested with kernels 2.6.28, 2.6.29 and 2.6.30 all obtained
> from git.kernel.org and configured the same.
> So, on my EP88xc board 2.6.28 and 2.6.29 work ok, 2.6.30 has the
> slowdown issue after loading a ramdisk.
> 
> After doing this testing I have a side question:
> If I modify just arch/powerpc/configs/ep88x_defconfig, not all changes
> are reflected in the resulting .config when i do "make
> ep88x_defconfig; make uImage". I ended up having to modify
> arch/powerpc/Kconfig, arch/powerpc/configs/ep88xc_defconfig,
> fs/ext2/Kconfig and init/Kconfig to get "make ep88x_defconfig; make
> uImage" to create a properly configured image, but this really doesn't
> feel right. What's the proper way to set up a defconfig?

What changes are you trying to make to the config, and what did you 
change in the Kconfig files?

-Scott