This is an offtopic question. What determines the amount of 'reserved' memory,
and how much to reserve?
With 2.4.1-ac3, I came up with the following different memory readings for
both a Pentium 166 and an Athlon 750.
Pentium 166: (96MB RAM)
------------
BIOS-provided physical RAM map:
BIOS-e820: 000000000009fc00 @ 0000000000000000 (usable)
BIOS-e820: 0000000000000400 @ 000000000009fc00 (usable)
BIOS-e820: 0000000000010000 @ 00000000000f0000 (reserved)
BIOS-e820: 0000000005f00000 @ 0000000000100000 (usable)
BIOS-e820: 0000000000010000 @ 00000000ffff0000 (reserved)
On node 0 totalpages: 24576
zone(0): 4096 pages.
zone(1): 20480 pages.
zone(2): 0 pages.
Memory: 94732k/98304k available (890k kernel code, 3184k reserved, 261k data,
176k init, 0k highmem)
Athlon 750: (128MB RAM)
-----------
BIOS-provided physical RAM map:
BIOS-e820: 000000000009fc00 @ 0000000000000000 (usable)
BIOS-e820: 0000000000000400 @ 000000000009fc00 (reserved)
BIOS-e820: 0000000000010000 @ 00000000000f0000 (reserved)
BIOS-e820: 0000000000010000 @ 00000000ffff0000 (reserved)
BIOS-e820: 0000000007f00000 @ 0000000000100000 (usable)
On node 0 totalpages: 32768
zone(0): 4096 pages.
zone(1): 28672 pages.
zone(2): 0 pages.
Memory: 126500k/131072k available (1127k kernel code, 4184k reserved, 322k
data, 200k init, 0k highmem)
Last year, when I had 32MB of memory in the Pentium 166 machine, the amount of
'reserved' memory seemed lower. It almost looked as if the amount of reserved
memory is a fraction of total available memory.
Is there a way I can 'regain' this memory from the system, especially in cases
when there's only 32MB to work with?
Thanks,
Byron
--
Byron Stanoszek Ph: (330) 644-3059
Systems Programmer Fax: (330) 644-8110
Commercial Timesharing Inc. Email: [email protected]
> This is an offtopic question. What determines the amount of 'reserved' memory,
> and how much to reserve?
The BIOS
> Is there a way I can 'regain' this memory from the system, especially in cases
> when there's only 32MB to work with?
In theory if ACPI isnt being used we can reclaim some of it on certain boxes
but I dont believe anyone has implemented that yet