[Crash-utility] ARM support for CONFIG_SPARSEMEM: (was Re: DDimage)

[Mika Westerberg]

On Wed, May 25, 2011 at 10:11 AM,  <takuo.koguchi.sw at hitachi.com> wrote:
>>... But I got another error later, which I will report later.
> Now I set _SECTION_SIZE_BITS 22 and see what happens next.
> I found that readmem for "page table" failed while excuting init_unwind_tables() in unwind_arm.c and crash exited.
>
> crash: invalid kernel virtual address: f67f000  type: "page table"
>
> Instead of investigating this issue, I continue by skipping init_unwind_tables for a while.
> Because crash gives me a prompt now and I am quite interested in whether it gives me some useful information or not.
>

Please check your platforms
arch/arm/mach-<yourmach>/include/mach/memory.h and set both
_SECTION_SIZE_BITS and _MAX_PHYSMEM_BITS to be the same as defined in
the header. If crash works with the correct values, we just need to
find out some way of guessing these.