Re: dpt_i2o for amd64
On Tue, 26 Apr 2005 09:03:02, Christoph Hellwig wrote:
> On Tue, Apr 26, 2005 at 12:10:31AM +0200, Frederik Schueler wrote:
> > Hello,
> >
> > I have a dpt_i2o card myself wich I had to remove from my workstation
> > when I moved to amd64, I know your problem pretty well. Thus I am
> > interested in this patch, I tried to contact adaptec back then but
> > got no response. Where did you get that patch from? Was it already
> > proposed for inclusion in the official 2.6 tree?
>
> Not sure where this thread started, but please always use the
> i2o_block/i2o_scsi drivers and not dpt_i2o for 2.6.x.
There is no support for the i2o block driver in the debian installer.
The debian-supplied kernels don't even have the i2o modules enabled.
There _is_ support for the dpt_i2o driver in the installer, on both
2.4 and 2.6 kernels. It just didn't work on 2.6 in 64 bit mode.
> If you see
> problems with that driver please report it to the very active upstream
> maintainer.
There are problems with the i2o block driver in 64 bits mode,
it doesn't work if you have 4GB of RAM. I reported this to the
maintainer a week ago, on LKML. I did get an initial reponse
from the i2o maintainer Markus Lidel right away, and Alan Cox,
after which we figured out that the driver was not DMA 32/64 bit
clean. But there hasn't been a followup on that yet. A workaround
is booting with mem=3840m, by the way. That makes it work.
I did make a driver floppy for the dpt_i2o.ko module to use in the
installation process - which works just fine, _except_ that after
you reboot, the newly installed kernel doesn't have that module,
so that it's impossible to mount the root filesystem :( So again,
with the current debian-installer, dpt_i2o needs to be in the
debian-provided kernels.
As things stand now, using dpt_i2o will get us a working dpt driver
in sarge, while moving to i2o_block is an etch project I guess.
Frederik- I'll send you the driver I got from Adaptec later today.
Mike.
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