Help! Memory gone missing...

[Jonathan Heaney <j.heaney@zetnet.co.uk>]

A curious thing happened recently (don't know exactly when, just noticed
it)

Debian (potato, custom 2.2.15pre15 kernel) seems to have 'lost' 128meg
of memory.

I've got 192 in my system (recently gone from 128 which went OK)

cat /proc/meminfo gives:-

        total:    used:    free:  shared: buffers:  cached:
Mem:  65585152 64434176  1150976 41328640  1363968 18788352
Swap: 156270592  5042176 151228416
MemTotal:     64048 kB
MemFree:       1124 kB
MemShared:    40360 kB
Buffers:       1332 kB
Cached:       18348 kB
SwapTotal:   152608 kB
SwapFree:    147684 kB


This is new.  When I upgraded 128 -> 192, the full 192 meg was seen
correctly (no need for append line in lilo.conf)

However, interestingly, cat /proc/mtrr shows:-

reg00: base=0x00000000 (   0MB), size= 128MB: write-back, count=1
reg01: base=0x08000000 ( 128MB), size=  64MB: write-back, count=1
reg02: base=0xe0000000 (3584MB), size=  32MB: write-combining, count=1
reg03: base=0xd8000000 (3456MB), size=  64MB: write-combining, count=1

The first 128 and 64 is my main system memory, the 32 is my G400's
framebuffer and the last 64 is my agp gart.

Potato is kept up-to-date, but I have been (until fairly recently when
it stopped playing) using the 2.3 devel kernel.

Anybody got any ideas?

Jonathan