I have a netbook (Acer Aspire One A110L) and installed a 1GB DDR2 in the available slot, for a total of 1.5GB or RAM. The BIOS reports it as 1.5GB and so does grml linux (booting from usb), but the installed gentoo linux reports only 904600 kB:
# free total used free shared buffers cached Mem: 904600 82316 822284 0 9752 37712 -/+ buffers/cache: 34852 869748 Swap: 1638588 0 1638588 # cat /proc/meminfo MemTotal: 904600 kB MemFree: 822284 kB Buffers: 9752 kB Cached: 37712 kB SwapCached: 0 kB Active: 32232 kB Inactive: 28780 kB Active(anon): 13848 kB Inactive(anon): 0 kB Active(file): 18384 kB Inactive(file): 28780 kB Unevictable: 0 kB Mlocked: 0 kB SwapTotal: 1638588 kB SwapFree: 1638588 kB Dirty: 4 kB Writeback: 0 kB AnonPages: 13548 kB Mapped: 11256 kB Shmem: 300 kB Slab: 10356 kB SReclaimable: 6132 kB SUnreclaim: 4224 kB KernelStack: 1424 kB PageTables: 892 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 2090888 kB Committed_AS: 73552 kB VmallocTotal: 122880 kB VmallocUsed: 9688 kB VmallocChunk: 109832 kB DirectMap4k: 11832 kB DirectMap4M: 905216 kB I suspect it has to do with my kernel (2.6.32-gentoo-r1) configuration, but do not know where to look. Any suggestions ?