From: Oliver Joa <oliver@j-o-a.de>
To: Gabriel C <nix.or.die@googlemail.com>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: How to Switch DMA off for only one Harddisk at Kernelboot
Date: Sun, 16 Dec 2007 20:53:25 +0100 [thread overview]
Message-ID: <47658235.7050409@j-o-a.de> (raw)
In-Reply-To: <47658063.5010707@googlemail.com>
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
next prev parent reply other threads:[~2007-12-16 19:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <4765690C.6010605@j-o-a.de>
[not found] ` <47657BA8.3020004@googlemail.com>
[not found] ` <47657D79.7090100@j-o-a.de>
2007-12-16 19:45 ` How to Switch DMA off for only one Harddisk at Kernelboot Gabriel C
2007-12-16 19:53 ` Oliver Joa [this message]
2007-12-16 20:31 ` Gabriel C
2007-12-29 11:50 ` Konstantin A. Lepikhov
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