Re: Memory detection problem in 2.4.19-rc2

[Adrian Bunk]

On Sat, 20 Jul 2002, Leonardo Gomes Figueira wrote:

> Hi,
>
> i have a Toshiba K6-2 450 notebook with 32MB RAM onboard plus an 256MB chip.
>
> I use kernel 2.4.18 with the mem param on the boot (mem=288M) and it
> works fine. (Without the mem param it only detects 32MB).
>
> I've been testing 2.4.19-preX (8,9,10 maybe others before, i don't
> remember) and 2.4.19-rcX (1,2) but in this releases it don't detect more
> than 32MB even with the mem param. I didn't test in 2.4.19-rc3 yet but i
> read the changelog and didn't see any change in this area but i can test
> if it helps.
>...

It seems that the change Christoph introduced (from Red Hat's tree) in the
lines around 810 (line number in -rc3) in arch/i386/kernel/setup.c didn't
consider the case that someone want's to _in_crease the size of the memory
by using the "mem="  parameter.

It's the following Changeset:

<--  snip  -->

   Changeset details for 1.383.2.25

   ChangeSet@1.383.2.25  2002-04-15 23:18:40-03:00  [e-mail]
   all diffs
   [PATCH] mem= command lines fixes.
   Another patch from Red Hat's tree:
     mem= command-line adapts itself to existing e820 values.
     without this patch mem=xxxM ignores bios-reserved areas and uses
     them as RAM. This patch makes the kernel skip these areas
   arch/i386/kernel/setup.c@1.38  2001-04-05
   21:19:09-03:00  [e-mail]

<--  snip  -->

> Thanks,
>
>     Leo
>...

cu
Adrian

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