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Re: 64bit DMA in i2o_block [message #6784 is a reply to message #6780] Fri, 22 September 2006 11:47 Go to previous messageGo to previous message
Markus Lidel is currently offline  Markus Lidel
Messages: 7
Registered: March 2006
Junior Member
Hello,

Andi Kleen wrote:
> Markus Lidel <Markus.Lidel@shadowconnect.com> writes:
>> I believe it's a driver issue. Do you have a testing-system where you
>> could try out the appended patch?
> So it would bug instead?

Yes, because ATM i don't know why it doesn't work. It's just for debugging.

> Can you please just get rid of that CONFIG? Such things shouldn't
> be CONFIGs, but have a suitable default. In particular drivers
> running under 64bit should always support 64bit DMA.

The 64-bit DMA is only available on Adaptec controllers, all other I2O
controllers only work with 32-bit DMA. Although the 64-bit DMA is (as far
as i can remember) slower then the 32-bit DMA and is therefore only
useful on systems which run out of memory.


Best regards,


Markus Lidel
------------------------------------------
Markus Lidel (Senior IT Consultant)

Shadow Connect GmbH
Carl-Reisch-Weg 12
D-86381 Krumbach
Germany

Phone: +49 82 82/99 51-0
Fax: +49 82 82/99 51-11

E-Mail: Markus.Lidel@shadowconnect.com
URL: http://www.shadowconnect.com

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