Re: How to Switch DMA off for only one Harddisk at Kernelboot

[Oliver Joa]

Hi,

Gabriel C wrote:

[...]

> > > Also have a look at Documentation/ide.txt.
> > I read this already. Searching for "nodma" in this document gives only 
> > one line:
> >
> >   "ide=nodma"            : disable DMA globally for the IDE subsystem.
> >
> > If the documentation is correct hda=nodma and ideX=nodma should not 
> > work. I use kernel 2.6.23.1 at the moment.
>
> grep nodma Documentation/ide.txt
>  "hdx=nodma"            : disallow DMA
>
> ide=foo_option is for the whole ide sub-system where ideX|hdX=foo_option is just for that HDD.


/usr/src/linux-2.6.23.1$ grep nodma Documentation/ide.txt
 "ide=nodma"            : disable DMA globally for the IDE subsystem.

/usr/src/linux-2.6.21.5$ grep nodma Documentation/ide.txt
 "ide=nodma"            : disable DMA globally for the IDE subsystem.

/usr/src/linux-2.6.12# grep nodma Documentation/ide.txt
 "ide=nodma"            : disable DMA globally for the IDE subsystem.

Sorry, but I can not find this option, and it does not work. Which 
kernel do you use?

Thanks

Olli
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