If you have an AGP video card which you aren't actually using you can try
selecting the minimum possible AGP apperture (window whatever) size (possibly
even disable it?). This might help. Also removing the AGP card and using a
junk 1-8MB svga card will also possibly work. In my experience the linear
framebuffer of video cards is by far the greatest memory hog these days.
Cheers,
MaZe.
On Thu, 22 Jun 2006, Bruno Sousa wrote:
Hi there,
It seems like the bios of this machine doesn't have any type of
configuration regarding the memory mapping.
I'm already using the kernel-hugemem , but the problem remains.
What else can be done?
By the way, if the machine had more than one cpu, the problem would remain?
Best regards,
Bruno Sousa
-----Mensagem original-----
De: centos-bounces@xxxxxxxxxx [mailto:centos-bounces@xxxxxxxxxx] Em nome de
James Pearson
Enviada: quinta-feira, 22 de Junho de 2006 15:54
Para: CentOS mailing list
Assunto: Re: [CentOS] x86 uniprocessor 4GB memory
Bruno Sousa wrote:
Hi there,
I'm currently using CentOS 4.3 (Server edition) in a HP DC 5100 with the
IntelR 915GV chipset, powered by a PIV 3.0GHZ.
Now I'm facing a problem, with memory.
I got myself 4GB of memory, the system bios detects it correctly, but in
Linux can only see around 3.5gb memory. With the default kernel-smp (I use
hyperthread) or with kernel-hugemem , I have the same results.
Is there any way to workaround this issue?
It is probably the 4Gb memory hole issue - various 'things' reserve
memory below 4GB so hiding the real memory from the OS.
Your BIOS may have a mapping option to map some of this hidden real
memory to above 4Gb - however, you need to use a hugemem kernel to
access this memory.
James Pearson
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