Re: How to enable DMA at boot time
At 09:25 PM 12/01/02 -0800, Marc Wilson wrote:
>> > I've used the -k "keep" switch do htparm to remember DMA settings.
>>
>> I've tried that but the settings don't survive a reboot.
>
>Uh, they're not supposed to. That flag is "keep_over_reset", which means
>that if the kernel has to reset the drive for some reason, that the setting
>should stick.
Thanks. I just tested on my laptop and it doesn't keep over reboot indeed.
My error was I just installed a new machine where DMA was off on boot and
I used -k1 -d1 and that fixed it. Well, that I built a new kernel about
that time might have made the difference too!
moseley@laptop:~$ fgrep DMA /boot/config-2.4.18-xfs-laptop
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_BLK_DEV_ADMA=y
CONFIG_IDEDMA_PCI_AUTO=y
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDEDMA_AUTO=y
is what I see in my laptop config.
Thanks for the correction!
--
Bill Moseley
mailto:moseley@hank.org
Reply to: