lkml.org 
[lkml]   [2003]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 4Gb memory?
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.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:58    [from the cache]
©2003-2011 Jasper Spaans