On Fri, Jul 13, 2012 at 6:41 AM, Stefan Bader
<stefan.ba...@canonical.com> wrote:
> I was bisecting a problem on 64bit where any attempt to cause a crash kernel 
> to
> boot would hang. The bisect ended up on commit 722bc6b (x86/mm: Fix the size
> calculation of mapping tables) and somehow, looking at the calling function 
> and
> the ranges printed on boot, I think the calculations should only be done in 
> the
> 32bit case.
>
> On 64bit:
> [    0.000000] init_memory_mapping: [mem 0x00000000-0x77e87fff]
> [    0.000000]  [mem 0x00000000-0x77dfffff] page 2M
> [    0.000000]  [mem 0x77e00000-0x77e87fff] page 4k
>
> Attached patch would fix this if you agree with it. Thanks.

it does not look like for the hang for your system. maybe just because
it change a bit memblock allocation layout.

can you please post whole boot log that is working and not?

Thanks

Yinghai
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