Message-ID: <4FDA5048.5000107@redhat.com>
Date: Thu, 14 Jun 2012 16:57:44 -0400
From: Rik van Riel <riel@redhat.com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1
MIME-Version: 1.0
To: Wallak <wallak@free.fr>
CC: Jan Kara <jack@suse.cz>, linux-kernel@vger.kernel.org, jweiner@redhat.com
Subject: Re: File copy is very slow on linux-3.4.2 (or linux-3.3x) on a specific
 hardware: AMD FX-8150 + 990FX (solved?)
References: <1108815600.134531433.1339443818361.JavaMail.root@zimbra44-e7.priv.proxad.net> <437497008.134549481.1339444456294.JavaMail.root@zimbra44-e7.priv.proxad.net> <20120612165357.GI6021@quack.suse.cz> <4FD78CE4.4000209@free.fr> <20120612210947.GB20007@quack.suse.cz> <4FD7C595.202@free.fr> <20120613065313.GA25425@quack.suse.cz> <4FD8F9F1.2000205@free.fr>
In-Reply-To: <4FD8F9F1.2000205@free.fr>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 736
Lines: 19

On 06/13/2012 04:37 PM, Wallak wrote:

> HighTotal: 8052692 kB HighTotal: 8052692 kB
> HighFree: 7978664 kB | HighFree: 6227412 kB
> LowTotal: 229508 kB LowTotal: 229508 kB
> LowFree: 195804 kB | LowFree: 148948 kB

Did the BIOS remap essentially all of the low memory
to end up above the 1GB boundary?

This does not look like a system that should be run
with a 32 bit kernel, since it only has 200MB of lowmem,
giving you a 40:1 highmem:lowmem ratio, which is really
too much to run well.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/