On Thu,  5 Sep 2019 08:47:57 +0300
Mike Rapoport <[email protected]> wrote:

> From: Mike Rapoport <[email protected]>
> 
> The memory initialization of SGI-IP27 is already half-way to support
> SPARSEMEM and only a call to sparse_init() was missing. Add it to
> prom_meminit() and adjust arch/mips/Kconfig to enable SPARSEMEM and
> SPARSEMEM_EXTREME for SGI-IP27
> 
> Signed-off-by: Mike Rapoport <[email protected]>
> ---
> 
> Thomas, could you please test this on your Origin machine?

it crashes in sparse_early_usemaps_alloc_pgdat_section(). Since there is
already a sparse_init() in arch_mem_setup() I removed it from ip27-memory.c.
With this booting made more progress but I get an unaligned access in
kernel_init_free_pages(). 

My time is a little bit limited today to dig deeper, but testing patches
is easy.

Thomas.

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