From: Sid Boyce <sboyce@blueyonder.co.uk>
To: Con Kolivas <kernel@kolivas.org>
Cc: Nuno Monteiro <nuno@itsari.org>, linux-kernel@vger.kernel.org
Subject: Re: 2.6.x Scheduler, preemption and responsiveness - puzzlement
Date: Mon, 12 Jul 2004 10:19:36 +0100 [thread overview]
Message-ID: <40F257A8.10205@blueyonder.co.uk> (raw)
In-Reply-To: <cone.1089597462.444239.28499.502@pc.kolivas.org>
Con Kolivas wrote:
> Sid Boyce writes:
>
>> Nuno Monteiro wrote:
>>
>>>
>>> On 2004.07.11 23:55, Sid Boyce wrote:
>>>
>>>> I've been wondering why this is, I can't remember what the BIOS
>>>> says about the hard drives, from memory it looked OK, I think it
>>>> was set to
>>>
>>>
>>>
>>> <snip snip>
>>>
>>>> PCI IDE nVidia Corporation nForce2 IDE (rev a2)
>>>
>>>
>>>
>>> <snip snip>
>>>
>>>> # CONFIG_BLK_DEV_AMD74XX is not set
>>>
>>>
>>>
>>> You don't have the driver for your IDE chipset compiled in. In the
>>> "ATA/ ATAPI/MFM/RLL support" under "Device Drivers" menu select "AMD
>>> and nVidia IDE support". Also, you can disable the "Generic PCI IDE
>>> Chipset Support" and the "VIA82CXXX chipset support" you seem to
>>> have enabled.
>>>
>>> Then you should be able to do DMA, and things will go a lot faster.
>>>
>>>
>>> Hope this helps.
>>>
>>>
>>>
>>> Nuno
>>
>>
>> Oops!, thanks. The previous motherboard used the VIA chipset, so that
>> got missed when I changed over.
>> Regards
>> Sid.
>
>
> DMA disabled is perhaps the most common reason for poor performance
> under I/O loads. I think some cut down configurations that people have
> used from their 2.4 installations have missed the appropriate IDE driver.
>
> Cheers,
> Con
That fixed the problem. When I checked my P-II 333 box and AMD64 laptop
(VIA chipset), they were OK. Working on 4 boxes at the same time, I
guess I got stuck in a VIA mental groove.
Regards
Sid.
--
Sid Boyce .... Hamradio G3VBV and keen Flyer
===== LINUX ONLY USED HERE =====
prev parent reply other threads:[~2004-07-12 9:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-11 22:08 2.6.x Scheduler, preemption and responsiveness - puzzlement Sid Boyce
2004-07-11 22:18 ` bert hubert
2004-07-11 22:55 ` Sid Boyce
2004-07-12 1:00 ` Alistair John Strachan
[not found] ` <20040712000137.GA3854@hobbes.itsari.int>
2004-07-12 1:06 ` Sid Boyce
2004-07-12 1:57 ` Con Kolivas
2004-07-12 9:19 ` Sid Boyce [this message]
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