On Mon, Jan 18, 2010 at 6:09 PM, Mark Knecht <markkne...@gmail.com> wrote: > One of my machines smoked last week so when tearing it apart for spare > parts I noticed the the PC2700 CL 2.5 memory is what my wife's machine > uses and she had only 512MB so I took the opportunity to throw in a > couple of DIMMs. When I boot Linux (and I'm writing this from Linux > running the new memory so the machine works) top reports only about > 900MB while BIOS itself says 2GB. I fired up memtest86 and it reports > 2GB. It's been running memory tests for a couple of hours now with no > problems so it seems like it should work. > > Is there anything in the kernel config that would stop a 2.6.32-gentoo > kernel from seeing all the memory? > > I have double checked that the memory does seem to be seated well in > the DIMM sockets. > > The box is an old eMachines thing that has no support and so far I > can't find any BIOS updates. > > How does memory get reported up to the kernel? Is that something in > the kernel (i.e. - choosing the proper chipset support or something) > or is it purely the return from some sort of BIOS call? If so can it > be tested or circumvented to get the machine to recognize everything > I've put in? > > Thanks, > Mark
A very simple test - booting from an old Gentoo install CD - shows 2GB - so apparently it's a kernel config issue. Sorry for the noise. Cheers, Mark
