[LAU] debian realtime kernel config 2.6.25.8.rt7

Emanuel Rumpf xbran at web.de
Mon Jul 14 13:20:41 EDT 2008


2008/7/14 David Baron <d_baron at 012.net.il>:
>> you should then have a device
>>   /dev/rtc0
>
> I have /dev/rtc from previous
>
that's the old interface
it's incompatible, deactivate it. look at my config!
  ( zcat config.gz | grep -i rtc )
see src/Documentation/rtc.txt for more info

# CONFIG_RTC is not set
# CONFIG_GEN_RTC is not set
# CONFIG_HPET_RTC_IRQ is not set


>>
>> then change the max-user-frequency of rtc (default is only 64):
>>   echo 2048 > /sys/class/rtc/rtc0/max_user_freq
>
> I have this set to 1024 (kernel hz?) in /etc/sysctl.conf.
>
1024 is ok too.
for the new interface however, there doesn't seem to be a sysctl
option anymore/yet and one has to set it manually.


> One caveat is that hal kicks out all the dma and 32-bit disk
> accesses but they can be immediately set back so I put that in my startup
> stuff as well.
>
how do you set it up?
can/should that be done with any drive?
any conditions?



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