Re: Unrecognized RAM

[Berthold Cogel <cogel@rrz.uni-koeln.de>]

David De Graff wrote:
> ----- Original Message -----
> From: "nate" <debian-user@aphroland.org>
> To: <debian-user@lists.debian.org>
> Sent: Friday, September 20, 2002 7:07 PM
> Subject: Re: Kernel upgrade on remote server -- DONE
>
>
>
> > > Now I just need to figure out why the OS still doesn't recognize the
> full
>
> > > 1GB of RAM in the machine - I wonder if this kernel was compiled without
> > > himem support.
> >
> > what does 'free' say? from one of my boxes with 1GB ram(2.2.19):
> >            total       used       free     shared    buffers     cached
> > Mem:        970932     935060      35872     261600     504092     146920
> > -/+ buffers/cache:     284048     686884
> > Swap:      2000052          0    2000052
> >
> > from dmesg:
> > Memory: 970868k/983040k available (1544k kernel code, 428k reserved,
>
> 10136k
>
> > data, 64k init)
>
>
> Nate,
>
> Thanks for the help.
>
>              total       used       free     shared    buffers     cached
> Mem:        905748     460160     445588          0      78244     317964
> -/+ buffers/cache:      63952     841796
> Swap:      2048248          0    2048248
>
> Here's the key info from dmsg:
>
> Warning only 896MB will be used.
> Use a HIGHMEM enabled kernel.
> 896MB LOWMEM available.
>
> Do I need to compile a custom kernel to use more RAM?
>
> I also see this:
>
> Advanced speculative caching feature not present
>
> Is that feature worthwhile and stable? If so, how do I activate it?
>
> Best,
>
> Dave

With kernel 2.4. you have to activate the high memory support. It's in 
the kernel configuration in 'Processor type and features'. With more 
than 896MB you have to set it to 4GB if you want to use all the 
available memory.

Berthold