On Fri, 16 Jul 1999, Pete Walters wrote:
> I read the SMP FAQ, and I couldn't find anything about this, so I thought
> I'd try here for help. I'm fairly new at this so I'll try my best not to
> sound like an idiot. =)
>
> I just built an SMP box with the following:
>
> 2 celeron 300A PPGa
> 2 MSI slot1 adapters
> 1 128 MB DIMM
> SuperMicro P6DBE board
> ....
>
> Here's the probelm - I installed SUSE 6.1 and only 64MB of memory is
> reported by top and /proc/meminfo. I recompiled the kernel for SMP and
> both processors and everything else seems to be running correctly, I just
> can't get it to see all 128MB of memory.
>
> Another interesting note - when I upgraded the machine, I took a hard
> drive that already had SUSE 6.1 installed on it out of an old machine
> (Pentium 200) to use on my new one. When I booted it up, it seen all 128MB
> of memory.
I don't think this is an SMP problem at all. Linux will normally only see
and ause the first 64 MB of RAM. In order to make it see and use more, you
have to tell it to do so.
You do that by specifying the additional boot parameter to the kernel:
"mem=<YourMemorySize>"
or in this case
mem=128MB
For information on how to pass this parameter, look up your boot loader
documentation. On LILO, it is usually done by specifying the "append="
parameter in the relevant section, e.g.
append="mem=128MB"
HTH
Gordan
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