Re: [Qemu-devel] [PATCH 0/2] mac-io IDE DB-DMA support

[Aurelien Jarno]

On Thu, Jan 29, 2009 at 09:25:18PM +0100, Laurent Vivier wrote:
> This series of patch allows to use powermac mac-io IDE interface by  
> implementing
> DB-DMA. Linux 2.6.18 seems to not be able to use correctly mac-io IDE  
> interface
> without DMA.
>
> [PATCH 1/2] mac-io DB-DMA support
> [PATCH 2/2] IDE DB-DMA support

Thanks a lot for your work. I have tried it, but I have a few problems
with it. I tried with OpenBIOS revision 431.

With a 2.6.18 kernel (Debian Etch), it works without problem, I get a 
about 13MB/s, compared to 1.5MB/s without DMA and about 21MB/s with the
CMD646.

With the 2.6.26 kernel (Debian Lenny), I get 1.2MB/S only. Moreover,
trying an installation with a CD-ROM, the VM freeze while loading udeb
packages. Note that the DMA is correctly detected and actived.

Given that those patches really improve the support for the mac-io IDE,
I have merged them with one minor change to the first one
(s/conditionnal/conditional/g).

-- 
Aurelien Jarno                          GPG: 1024D/F1BCDB73
address@hidden                 http://www.aurel32.net