Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 27 Oct 2003 16:10:18 -0500 (EST) | From | Zwane Mwaikambo <> | Subject | Re: 4Gb memory? |
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On Mon, 27 Oct 2003, Hakona Spect wrote:
> Hi, I just installed 4GB memory to my system. In BIOS it shows up all 8x512M > chips. But after boot it shows: > > $ free > total used free shared buffers cached > Mem: 3753328 566800 3186528 0 96040 189960 > -/+ buffers/cache: 280800 3472528 > Swap: 2096440 0 2096440 > > $dmesg > Linux version 2.4.22 (root) (gcc version 3.2.2 20030222 (Red Hat Linux > 3.2.2-5)) #1 SMP Mon Oct 27 12:44:16 EST 2003 > BIOS-provided physical RAM map: > BIOS-e820: 0000000000000000 - 00000000000a0000 (usable) > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved) > BIOS-e820: 0000000000100000 - 000000007ff77000 (usable) > BIOS-e820: 000000007ff77000 - 000000007ff79000 (ACPI NVS) > BIOS-e820: 000000007ff79000 - 00000000e7f77000 (usable) > BIOS-e820: 00000000e7f79000 - 00000000e8000000 (reserved) > BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) > BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved) > BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved) > user-defined physical RAM map: > user: 0000000000000000 - 00000000000a0000 (usable) > user: 00000000000f0000 - 0000000000100000 (reserved) > user: 0000000000100000 - 000000007ff77000 (usable) > user: 000000007ff77000 - 000000007ff79000 (ACPI NVS) > user: 000000007ff79000 - 00000000e7f77000 (usable) > user: 00000000e7f79000 - 00000000e8000000 (reserved) > user: 00000000fec00000 - 00000000fec10000 (reserved) > user: 00000000fee00000 - 00000000fee10000 (reserved) > user: 00000000ffb00000 - 0000000100000000 (reserved) > 2815MB HIGHMEM available. > 896MB LOWMEM available.
Which motherboard? Some boards will reserve some of the area between ~3.7 and 4G for various option roms and other devices present in the system. Resulting in "lost" physical RAM.
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