Re: Failing back to INSANE timesource :) Time stopped today.

From: Maciej W. Rozycki (macro_at_ds2.pg.gda.pl)
Date: 04/20/04

  • Next message: Giuseppe Bilotta: "[PATCH] Fix scancode->keycode->scancode conversion for 2.6.5" 
    Date:	Tue, 20 Apr 2004 14:40:55 +0200 (CEST)
To: Niclas Gustafsson <niclas.gustafsson@codesense.com>

    On Tue, 20 Apr 2004, Niclas Gustafsson wrote:

    > I've now been running the system since last week, about 6 days now with
    > sometimes quite high load, both in regard to CPU usage and network
    > traffic.
    > And it seems to be running just fine with the patch from Maciej.

     I'm glad to read this.

    > I've got a couple of questions,
    >
    > When was this bug introduced? Was it 2.6.1 ( or rather somewhere in
    > 2.5)? Or was it already present in 2.4?

     Well, the bug has been introduced by IBM in their firmware (SMM code).
    ;-) The patch only works it around. Functionally the changed code is the
    same for your configuration.

     If you are asking about the problematic code, then it's there since
    2.3.x, so it's in 2.4, too. It's a part of the NMI watchdog support,
    though it's used for ordinary timer interrupts for certain systems as
    well.

    > When will this patch be merged into the 2.6-tree? I don't have to
    > stress the impact of this problem on IBM servers as they are rendered
    > quite useless.

     Apparently there are problems with the workaround on certain AMD
    Athlon-based systems. I suppose they need to be resolved somehow first.

    > Which other IBM models are affected? Can I run 2.6.5 on my 345:s or
    > 335:s? Do they use the same buggy SMM firmware?

     Ask IBM. The reason is an incorrect handling of PIC (8259A) state
    saving/restoration. 

    -- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +
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  • Next message: Giuseppe Bilotta: "[PATCH] Fix scancode->keycode->scancode conversion for 2.6.5"

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