[Voyage-linux] nodma Kernel Option (still) Not Working

[Jim Cromie]

this worked for me.
     ide_core.nodma=0.0

worked for him too.



On Tue, Aug 10, 2010 at 10:04 PM, Jim Cromie <jim.cromie at gmail.com> wrote:

>
> hi Miroslav
> (not addressed to you cuz emails arent getting delivered to me for some
> reason,
> hope youre reading the list)
>
>
> Hello,
>
> can someone please confirm the ide=nodma option works for them in the stock
> voyage 0.6.5 kernel on WRAP boards?
>
> I have the following in my /boot/grub/menu.lst:
>
> kernel /vmlinuz root=LABEL=ROOT_FS  console=ttyS0,38400n8 ide=nodma
>
> this worked for me.
>      ide_core.nodma=0.0
>
> the ide_core. prefix is needed cuz module is built-in, IIUC
>
> all_generic_ide
> didnt help me either.
> is in ata_generic, which is loaded from initrd I think.
> I dont think it needs the modname prefix, but try it,
> and please report back if it works (so Ican check my 'facts')
>
>
>
>
>
>
> grep dma Documentation/kernel-parameters.txt
>
> ide-core.nodma= [HW] (E)IDE subsystem
>  Format: =0.0 to prevent dma on hda, =0.1 hdb =1.0 hdc
> libata.dma= [LIBATA] DMA control
>  libata.dma=0  Disable all PATA and SATA DMA
> libata.dma=1  PATA and SATA Disk DMA only
>  libata.dma=2  ATAPI (CDROM) DMA only
> libata.dma=4  Compact Flash DMA only
>  Combinations also work, so libata.dma=3 enables DMA
> * Transfer mode: pio[0-7], mwdma[0-4] and udma[0-7].
>   udma[/][16,25,33,44,66,100,133] notation is also
> Format: <io>,<irq>,<dma>
>
>
> This is what I was using for years in Voyage up to 0.5, starting 0.6 (and
> in 0.6.5 as well) it does not work
> anymore and the system is still waiting for DMA timeouts.
>
>
>
>
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