[coLinux-users] Re: only half of memory detected

[Nuno L. <nt...@nl...>]

Dani Ridhaswana, dando pulos de alegria, escreveu :
> Hi,
> 
> I have Z-pro machine with 4GB RAM installed. On
> colinux xml file I tried to use 1000MB of memory for
> colinux, but it's detected only ~500MB. Do you know
> why? Is it because I used 1024MB image file for swap?

CoLinux memory is limited by kernel memory.
Windows (and Linux in some configs) uses 2GB for user space and 2GB for 
kernel space, so you can only use 2GB for all your kernel address space.

Your graphics card AGP memory is also mapped into the kernel address 
space, which will probably give you only the ~500MB you say you have 
left (also, it's not easy to fit all kernel objects inside only 1GB of 
memory - that includes bitmaps (your desktop background), as GDI is in 
kernel space).

The swap file is not relevant.
The only fix I know is going for a 64 bits OS. There are some hacks for 
the normal 32 bits Linux to address more memory, but the real solution 
is 64-bit Linux and/or 64-bit Windows as the host OS (note that Linux 
doesn't use as much kernel memory as Windows, so the problem is not so big).

> Another question, can TAP-win32 driver has 100Mbps
> instead of 10Mbps connection?

That value is not relevant.
The network interface is known to be slow, but remember colinux is still 
in an early phase of development ;)

Regards,
~Nuno Lucas