Message-ID: <4FDCDF59.9020208@free.fr>
Date: Sat, 16 Jun 2012 21:32:41 +0200
From: Wallak <wallak@free.fr>
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To: Rik van Riel <riel@redhat.com>
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> <4FDA5048.5000107@redhat.com>
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Rik van Riel wrote:
> 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?

     May be not, but there was also a vmalloc= option on the linux 
command line; Theses options must be used with caution, and takes some 
low memory.
>
> 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.
>
     You are right; I will try also in 64-bits mode.

                                                                         
                                         Wallak.

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