mem=options changed in 2.6.x?

mem=options changed in 2.6.x?

[Casey Allen Shobe]

I have a Compaq Proliant 5000 with 320Mb RAM.

If I boot up either linux 2.4.22 or 2.6.4, it only identifies 12Mb of memory.

With 2.4.22, the kernel parameters "mem=exactmap mem=640k@0M mem=319M@1M"
worked to make the kernel identify all of the memory.

I have tried the same with linux 2.6.4, but with the above flags the
kernel will not boot.  With "mem=320M", the system boots, but it still
thinks it has only 12Mb RAM.

Something I'm missing or did this change between releases?

Thanks in advance,

-- 
Casey Allen Shobe
Open Source Software Solutions
cshobe@osss.net

Re: mem=options changed in 2.6.x?

[Randy.Dunlap]

On Wed, 31 Mar 2004 16:28:35 -0500 (EST) Casey Allen Shobe wrote:

| I have a Compaq Proliant 5000 with 320Mb RAM.
| 
| If I boot up either linux 2.4.22 or 2.6.4, it only identifies 12Mb of memory.
| 
| With 2.4.22, the kernel parameters "mem=exactmap mem=640k@0M mem=319M@1M"
| worked to make the kernel identify all of the memory.
| 
| I have tried the same with linux 2.6.4, but with the above flags the
| kernel will not boot.  With "mem=320M", the system boots, but it still
| thinks it has only 12Mb RAM.
| 
| Something I'm missing or did this change between releases?

See file: Documentation/kernel-parameters.txt

Basically, you need to change "mem=" to "memmap=" in all 3 places
above.

--
~Randy
"You can't do anything without having to do something else first."
-- Belefant's Law

Re: mem=options changed in 2.6.x? (resolved)

[Casey Allen Shobe]

Randy.Dunlap said:
> See file: Documentation/kernel-parameters.txt

Thanks for pointing that out.  Fixed my problem and taught me a lot more
at the same time :).

-- 
Casey Allen Shobe
Open Source Software Solutions
cshobe@osss.net