Re: 3ware 7500 not working in 2.6.16.18, 2.6.17-rc5

[Jan Kasprzak <kas@fi.muni.cz>]

Robert Hancock wrote:
: It looks like this controller only supports 32-bit DMA addresses. For 
: some reason it's trying to feed in an SG list with addresses over 4GB, 
: which fails. I'd think this configuration should work, but maybe not?

	It worked in 2.6.15-rc2.

: It looks like you have IOMMU turned off - I think you'll really want to 
: turn that on with that much RAM (12GB). Even if this case did work as 
: well as it could, without IOMMU the kernel would have to bounce-buffer 
: the data below 4GB which will kill performance.

	Yes, I had problems with IOMMU in the past, so I used to run the
kernel with IOMMU turned off. Now I have turned it back on, and so far
it is working correctly. However, I think the 3ware driver should work even
with iommu=off (as it used to in 2.6.15-rc2).

-Yenya

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
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| http://www.fi.muni.cz/~kas/    Journal: http://www.fi.muni.cz/~kas/blog/ |
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