Re: Unbloating the kernel, was: :mem=16MB laptop testing

From: William Lee Irwin III (wli_at_holomorphy.com)
Date: 10/15/03

  • Next message: William Lee Irwin III: "Re: Unbloating the kernel, was: :mem=16MB laptop testing" 
    Date:	Wed, 15 Oct 2003 06:06:14 -0700
To: linux-kernel@vger.kernel.org

    On Tue, 2003-10-14 18:33:49 +0100, John Bradford <john@grabjohn.com>
    > wrote in message <200310141733.h9EHXnYg002262@81-2-122-30.bradfords.org.uk>:
    >> No, 2.6 should run on a 4MB 386 with no significant performance
    >> penalty against 2.0, in my opinion.

    On Wed, Oct 15, 2003 at 02:43:14PM +0200, Jan-Benedict Glaw wrote:
    > Achtually, with HZ at around 100 (or oven 70..80), an old i386 or i486
    > will *start* just fine, at least at 8MB. However, over some days /
    > weeks, the machine gets slower and slower (my testdrive: my 90MHz
    > P-Classic with 16MB). Even with that "much" RAM, I get hit by whatever
    > slows down the machine. I *think* that it's the MM subsystem, but I'm
    > really not skilled enough with it to blame it:)

    Well, unless it's an interrupts-safe critical section that's hurting,
    you could take profiles, provided you have enough RAM for the profile
    buffer (which appears to be large). You could easily do a quick hack
    to steal the profile buffer from e820 regions not otherwise used for
    RAM (i.e. unused because you did mem=) to handle that for a slow cpu
    with more RAM than 8MB.

    -- wli
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