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Message-ID: <47658B15.5090600@googlemail.com> Date: Sun, 16 Dec 2007 21:31:17 +0100 From: Gabriel C <nix.or.die@...glemail.com> To: Oliver Joa <oliver@...-a.de> CC: linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org Subject: Re: How to Switch DMA off for only one Harddisk at Kernelboot 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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