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SubjectRe: [PATCH] 2.0.35: updated Jumbo -4 patch
Date
Hi Patpong,

OK, I now have two reports of the patch causing a reboot just after the
bogomips calibration. In fact, that makes three machines tested that exhibit
exactly this behaviour.

All three machines use Intel Pentium/Pentium MMX/Tillamook processors. Machines
using i486, Cx486, Intel PII, Celeron, Cyrix 6x86, AMD K6 processors, etc... do
fine.

So I believe the problem stems from the f00f bug detection code in bugs.h,
called from check_bugs, interacting with some memory initialization code in
main.c.

I have moved up check_bugs in /init/main.c, this may be triggering the problem.

Could you please try the following, it should solve the problem:

- the Jumbo patch must have left a /init/main.c.orig file. Copy it back to
main.c, and do a "make zImage" again (that should be pretty fast). Install the
new kernel and reboot.

Here are the reports of the spontaneous reboot:

On Mon, 20 Jul 1998, Patpong Wetyanon wrote:
>My computer reboot after calibrating delay loop ..
>gcc-2.7.2.3
>redhat-4.2
>linux-2.0.35
>pnp patch
>aic7xxx 5.1.0pre4
>awedrv 0.4.2d
>
>P133/32MB/AHA2940
>
On Sun, 19 Jul 1998, Andreas U. Trottmann wrote:
>
....
>On the Tillamook, Linux started to boot, but after showing "Calibrating delay
>loop.." for an unusually long time (2 secs or so), it rebooted.

>The P120 doesn't have a graphics card (I could dig one up though, if you
>want...) but it seemed to show the same behaviour: It rebooted constantly.

Thanks a lot for the testing/debugging. :-)

Cheers,
---------------------
Andrew D. Balsa
andrebalsa@altern.org

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