Re: solution Re: lost memory on a 4GB amd64

From: Andreas Klein (Andreas.C.Klein_at_physik.uni-wuerzburg.de)
Date: 10/27/04

  • Next message: Alan Cox: "Re: Let's make a small change to the process" 
    Date:	Wed, 27 Oct 2004 18:05:40 +0200 (CEST)
To: Sergei Haller <Sergei.Haller@math.uni-giessen.de>

    Hello,

    On Wed, 27 Oct 2004, Sergei Haller wrote:

    > On Wed, 27 Oct 2004, Andreas Klein (AK) wrote:
    >
    > Are you sure this is the same problem, that I have? You discovered
    > Problems with memtest86:
    >
    > > Memtest sees 0-2GB mem usable and 4-6GB unusable (complains
    > > about each memory address).
    >
    > I didn't:
    >
    > > memtest86 is happy with the memory.

    Memtest is happy with my memory too, if all 4 modules are installed in the
    slots belonging to CPU1. If I install 2 modules for each CPU, memtest86 is
    not happy anymore.

    >
    > The next difference:
    > You have the S2885 (thunder K8W) and S2875S (tiger K8W single processor)
    > boards and I have a S2875 (tiger K8W double processor)

    The boards are nearly identical (on-board lan is different, and your
    memory-slots are connected to one CPU).
    If all memory modules are installed for one CPU, I have your problems.
    Additionaly there are some other problems that only occur, when the
    modules are installed one pair for each CPU.

    Since I have a pre-producion board and bios which is running solid as a
    rock, regardless if a SMP/no-SMP kernel is installed, I hope that they
    will fix all problems.

    > I summarize (again) my problems:
    >
    > Independantly of the memory settings in the BIOS:
    > - non-SMP Kernel is stable
    > - memtest86 does not report any errors
    >
    > If the memory (4GB) is set up in one block (0-4GB) in the BIOS, then
    > - SMP Kernel is stable
    >
    > If the memory (4GB) is set up in two blocks (eg. 0-3GB, 4-5GB) in the
    > BIOS, then
    > - SMP Kernel is stable _if_and_only_if_ NUMA is _disabled_.
    >
    >
    > BTW.: I won't be able to flash a new BIOS to our machine, since it is in
    > production use and runs _rock_stable_ with _full_memory_ after we
    > _disabled_ NUMA support in the kernel. (see the two small programs posted
    > by me and by Andi Kleen)
    >
    > What I COULD do is running some tests if needed. (e.g. to check if the
    > Board/BIOS is lying about its capabilities)
    >
    >
    > 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/
    >

    -- Andreas Klein
       asklein@cip.physik.uni-wuerzburg.de
       root / webmaster @cip.physik.uni-wuerzburg.de
       root / webmaster @www.physik.uni-wuerzburg.de
    _____________________________________
    | |
    | Long live our gracious AMIGA! |
    |___________________________________|

    -
    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/

  • Next message: Alan Cox: "Re: Let's make a small change to the process"

    Relevant Pages

    • Re: Your next Computer upgrade
      ... Memory arrived tonight and I couldn't resist. ... One note - didn't install a floppy drive this time - first time ever. ... I DL'ed the BIOS and put it on my MUVO MP3 player. ...
      (comp.sys.ibm.pc.games.action)
    • Re: Installing Memory Problem
      ... Haven't tried Andrews suggestion yet though. ... revert the bios back to ... They are the correct memory sticks for the MB. ... >> must install one of your two memory modules on DDR3. ...
      (microsoft.public.windowsxp.hardware)
    • Re: Your next Computer upgrade
      ... Haven't noticed the memory holding me back yet but obviously need to mess around a lot more yet. ... Installed the new PSU and planned out the wiring, fitted the CPU to the mobo and installed the mobo to the case - around another hour/hour and half. ... What's such a bitch about MS's updated page is that you have to DL like 62 patches BEFORE it even lets you install SP2! ... I DL'ed the BIOS and put it on my MUVO MP3 player. ...
      (comp.sys.ibm.pc.games.action)
    • Re: XP SP2 install problems
      ... Last time I had problems like this it was down to the memory. ... > I have been trying to install WinXP SP2 on the system. ... > I have updated the BIOS to the latest release from Soyo. ... I had to replace the CPU ...
      (microsoft.public.windowsxp.hardware)
    • Re: K8N-E Memory
      ... > in raid 0) until I disabled all other boot drives in the bios and the raid ... A CD can be prepared with memtest86+ on it if you have no ... Test the memory while using the new, ...
      (alt.comp.periphs.mainboard.asus)