From: Aurelien Jarno <aurelien@aurel32.net>
To: qemu-devel@nongnu.org
Cc: laurent@vivier.eu
Subject: Re: [Qemu-devel] [PATCH 0/2] mac-io IDE DB-DMA support
Date: Fri, 30 Jan 2009 21:39:32 +0100 [thread overview]
Message-ID: <20090130203932.GB8917@volta.aurel32.net> (raw)
In-Reply-To: <FE922BAB-3CEE-4C70-B636-47B91D7EF4A9@vivier.eu>
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
aurelien@aurel32.net http://www.aurel32.net
next prev parent reply other threads:[~2009-01-30 20:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-29 20:25 [Qemu-devel] [PATCH 0/2] mac-io IDE DB-DMA support Laurent Vivier
2009-01-29 21:33 ` [Qemu-devel] [PATCH 1/2] mac-io " Laurent Vivier
2009-01-29 21:33 ` [Qemu-devel] [PATCH 2/2] IDE " Laurent Vivier
2009-01-30 20:39 ` Aurelien Jarno [this message]
2009-01-30 20:46 ` [Qemu-devel] [PATCH 0/2] mac-io " Laurent Vivier
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