From: Gabriel C <nix.or.die@googlemail.com>
To: Oliver Joa <oliver@j-o-a.de>
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 21:31:17 +0100 [thread overview]
Message-ID: <47658B15.5090600@googlemail.com> (raw)
In-Reply-To: <47658235.7050409@j-o-a.de>
Oliver Joa wrote:
> 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?
This is my devel box , running 2.6.24-rc5-git
>
> Thanks
>
> Olli
>
Gabriel
next prev parent reply other threads:[~2007-12-16 20:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-16 18:06 How to Switch DMA off for only one Harddisk at Kernelboot Oliver Joa
2007-12-16 19:25 ` Gabriel C
2007-12-16 19:33 ` Oliver Joa
2007-12-16 19:45 ` Gabriel C
2007-12-16 19:53 ` Oliver Joa
2007-12-16 20:31 ` Gabriel C [this message]
2007-12-29 11:50 ` Konstantin A. Lepikhov
2007-12-16 20:16 ` Alan Cox
2007-12-17 11:17 ` Oliver Joa
2007-12-17 11:58 ` Bartlomiej Zolnierkiewicz
2007-12-17 22:32 ` Lennart Sorensen
2007-12-17 23:44 ` Oliver Joa
2007-12-18 0:04 ` Alan Cox
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