I just upgraded my memory from 1GB to 4GB. For some reason the system is only reporting 2.8GB total:
noleks-ub:~> free -m
total used free shared buffers cached
Mem: 2770 1321 1448 0 169 571
-/+ buffers/cache: 580 2190
Swap: 2557 0 2557
Has anyone else seen this? I read something about reconfiguring the kernel to use more memory, but I'm not sure whether the Update Manager can adapt to the new physical memory available, or whether I need to tweak and rebuild the kernel myself?
If the latter is the case, I then would have a couple additional questions:
1) What is the working directory for a kernel build, for instance I don't know the difference here in /usr/src:
drwxr-xr-x 24 root root 4096 2011-03-30 23:25 linux-headers-2.6.32-302) If I run make menuconfig or whatever, will the settings used for the previous kernel build be maintained (ie I can tweak just what I need to tweak)?
drwxr-xr-x 7 root root 4096 2011-03-30 23:26 linux-headers-2.6.32-30-generic