>On Fri, 2012-12-14 at 16:35 +0400, Phileas Fogg wrote:
>> Hi,
>>
>> I wanted to bring to your attention the fact that the PS3 platform is broken
>> on Linux 3.7.0.
>>
>> i'm not able to boot Linux 3.7.0 on my PS3 slim. Linux 3.6.10 boots just
>> fine but not 3.7.0
>> When i try to boot Linux 3.7.0 then my PS3 shuts down.
>>
>> So i cloned the Linux powerpc GIT repository and tried to find out which
>> commits broke the PS3 platform.
>> After some time I tracked it down to 2 commits:
>
>Aneesh, do you have any idea what might be going on there ? Can you look
>at the PS3 hash code ? It's a bit different from the rest, you might
>have missed an update or two...
>
>Michael, same deal with PACA...
>
>Cheers,
>Ben.
I debugged the issue with the panic on PACA access on PS3 arch and found out
that it panics in
arch/powerpc/kernel/setup_64.c -> early_setup -> udbg_early_init ->
register_early_udbg_console -> console_lock -> down ->
raw_spin_unlock_irqrestore
It panics only if i enable lock debugging in kernel.
I suggest the following patch to fix the issue:
--- arch/powerpc/kernel/setup_64.c.old 2013-02-10 13:39:45.147131547 +0100
+++ arch/powerpc/kernel/setup_64.c 2013-02-10 13:40:51.697135419 +0100
@@ -186,6 +186,9 @@
initialise_paca(&boot_paca, 0);
setup_paca(&boot_paca);
+ /* Allow percpu accesses to "work" until we setup percpu data */
+ get_paca()->data_offset = 0;
+
/* Initialize lockdep early or else spinlocks will blow */
lockdep_init();
@@ -208,8 +211,6 @@
/* Fix up paca fields required for the boot cpu */
get_paca()->cpu_start = 1;
- /* Allow percpu accesses to "work" until we setup percpu data */
- get_paca()->data_offset = 0;
/* Probe the machine type */
probe_machine();
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
