Re: Adaptec 2010S i2o + x86_64 doesn't work

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Hello,

Arjan van de Ven wrote:
On Fri, 2005-04-15 at 20:10 +0200, Markus Lidel wrote:
Alan Cox wrote:
On Gwe, 2005-04-15 at 17:15, Miquel van Smoorenburg wrote:
However, I removed 2 GB from the box as Alan sugggested and now the box
comes up just fine with a 64-bit 2.6.11.6 kernel! I've put the 4GB back,
and booted with the kernel "mem=2048" command line option - that also
works, the i2o_block driver sees the adaptec controller just fine.
And I just booted it with "mem=3840M" and that works too.
So the problem appears to be 4 GB memory in 64 bit mode, on this box.
Or the driver is incorrectly handling 64/32bit DMA limit masks which
would be my first guess here, and would explain why it works on AMD
Athlon64 boxes.
Hmmm, i only set DMA_32BIT_MASK and don't do anything special on 64-bit systems... Is there anything else to do for correct DMA mapping?
are you sure the HW isn't 31 bit by accident ?

I don't know :-( But if the controller could only handle 31-bit DMA, wouldn't the 32-bit kernel with 4 GB also have the same problems?



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: [email protected]
URL:    http://www.shadowconnect.com
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