/proc/mtrr

gomez · 12-21-2004, 06:06 PM

i accidently entered something in to my mtrr file

Code:

echo "base=0xf8000000 size=0x2000000 type=write-combining" >| /proc/mtrr

the only thing wrong with this is the base address for my vid card. I'm unsure how to remove this line and enter the correct one. I thought i could just echo the correct parameters but i'm curious on how i'd remove the line. I'm able to vi into it but can't save it (i imagine it must be an important system file then.) Anyone run into this?

--gomez

leonscape · 12-21-2004, 06:25 PM

Can't you just reboot? isn't proc a psuedo filesystem created on the fly?

gomez · 12-21-2004, 06:29 PM

na, i guess not.

i just

Code:

cat /proc/mtrr

and the line is still there

Tinkster · 12-21-2004, 07:30 PM

I don't even understand how it got there in the first place,
since you're redirecting into a pipe?

Code:

echo "base=0xf8000000 size=0x2000000 type=write-combining" >| /proc/mtrr

The | shouldn't be there at all ...

Cheers,
Tink

kevinalm · 12-21-2004, 07:38 PM

/proc is a pseudo fs. It displays current values the kernel is using and allows you change certain kernel behavior on the fly. But it should revert on reboot. Most files in /proc are readonly, except for some that are rw for root. (There may be exceptions to that. Not sure.) Are you _sure_ that isn't the base addres for your vid card?

lspci -vv as root