lkml.org 
[lkml]   [2004]   [Sep]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: lost memory on a 4GB amd64
On Fri, 17 Sep 2004, Sergei Haller (SH) wrote:

SH> AW> No - thats what I use. Do you have MTRR support enabled?
SH>
SH> yes.
SH>
SH> AW> I'll send you my .config file; Perhaps you could try that.
SH>
SH> I just had a look at it. tomorrow morning I'll try out some of the
SH> options.
I tried out many configurations of the kernel config, nothing helped.

now I switched off SMP and it runs stable! So what am I to do about it?

that's the summary:

* if the memory is configured in one chunk (0-4gb) then the SMP kernel
works, but I only have about 3.4 gb main memory. (I know why)

* if the memory configuration is as follows: the first 3gb ar at the
normal address range, the fourth gb is at the address range 4-5gb.
then all 4gb are available (not quite -- a few mb ere missing, but
thats ok) and
- the SMP kernel panics as soon as I start X or allocate about 1.6gb of
memory (maybe less would trigger that as well, that was the only test
I ran) ahh, kernel compillation runs fine.
- the non-SMP kernel runs stable.
- memtest86 runs fine

all kernels I mention are 2.6.8.1 vanilla.

What do you think? Is there anything I can do?



Sergei
--
-------------------------------------------------------------------- -?)
eMail: Sergei.Haller@math.uni-giessen.de /\\
-------------------------------------------------------------------- _\_V
Be careful of reading health books, you might die of a misprint.
-- Mark Twain
-
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 14:06    [from the cache]
©2003-2011 Jasper Spaans