random panic and freezes on mpc8349 itx
Nicolas Schichan
nschichan at freebox.fr
Fri Sep 7 22:05:06 EST 2007
Hi,
I am currently working with an MPC8349ITX board and I have some trouble with
the kernel as soon as it reaches userland.
If I boot the kernel with all the memory (256MB) available (no mem=... on the
command line), I get random freezes or random kernel panics. Some times it
won't even run init. Some times it will panic badly if I try to put some
pressure to the system (stress --cpu 256). Some times it will hang
immediately after logging in, ...
If I boot the kernel with mem=64M, these freeze and random panic disapear and
I am able to run the stress program without any problems.
I have had this strange behaviour on both kernel 2.6.20 and 2.6.22 with
mpc834x_itx_defconfig (both from kernel.org) (ARCH=powerpc).
I am inclined to say that it is not a broken RAM chip problem because if I use
a 2.6.17 from kernel.org with all the RAM available (ARCH=ppc) configured
with mpc834x_sys_defconfig (there was no defconfig for the itx board on this
version) everything runs fine and I am able to run the stress program without
any problems.
The panic does not happen very often, 90% of the time, the board hangs and
stops responding to ping. When a panic do happen it is almost always in a
different place.
Does any of you have met this problem before ? If you have any clues about
what is hapenning I'd be glad to hear about it :)
Thank you for your attention,
Regards,
--
Nicolas Schichan
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