Hi there,
I am trying to set up a machine using the Tyan Tiger LE motherboard, and
ServerWorks III LE chipset to use 4096MB RAM. I'm using kernel 2.4.7 with
CONFIG_HIGHMEM4G.
I know that I have to set the MTRR's up to extend the cacheable memory
area, but can't work out how to set it up.
I tried the following:
# echo "disable=1" >| /proc/mtrr
# echo "disable=0" >| /proc/mtrr
# echo "base=0x0 size=0xFFFFFFFF type=write-back" >| /proc/mtrr
mtrr: size and base must be multiples of 4 kiB
mtrr: size: 0xffffffff base: 0x0
Which doesn't make any sense. So I tried for 3G RAM:
# echo "base=0x0 size=0xC0000000 type=write-back" >| /proc/mtrr
mtrr: base(0x0000) is not aligned on a size(0xc0000000) boundary
And then for 2G RAM:
# echo "base=0x0 size=0x80000000 type=write-back" >| /proc/mtrr
Which works perfectly. What gives?
Also: the instructions in Documentation/mtrr.txt says to use ">|" instead
of ">" (under bash, at least) - what does this accomplish?
Thanks,
Corin
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