random panic and freezes on mpc8349 itx

[Benedict, Michael]

What version of U-boot are you using?  Could it be RAM initialization?
There was a RAM initialization bug in the ITX for u-boot git sources
until April 2007.
	Good luck,
		Michael

linuxppc-embedded-bounces+mbenedict=twacs.com at ozlabs.org wrote:
> 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,