2001-04-22 11:52:19

by Anders Gustafsson

Subject: ide dma in /proc/dma

Hi!

why doesnt the dma for ide disks show up in /proc/dma?

heineken:~# hdparm -d /dev/discs/disc0/disc
/dev/discs/disc0/disc:
using_dma = 1 (on)

heineken:~# cat /proc/dma
4: cascade


--

//anders/g

2001-04-22 19:53:26

by Steven Walter

Subject: Re: ide dma in /proc/dma

On Sun, Apr 22, 2001 at 01:53:59PM +0200, [email protected] wrote:
> Hi!
>
> why doesnt the dma for ide disks show up in /proc/dma?
>
> heineken:~# hdparm -d /dev/discs/disc0/disc
> /dev/discs/disc0/disc:
> using_dma = 1 (on)
>
> heineken:~# cat /proc/dma
> 4: cascade

I suspect this is because only ISA DMA's are listed in /proc/dma, and
your IDE controller is likely PCI.
--
-Steven
In a time of universal deceit, telling the truth is a revolutionary act.
-- George Orwell