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Date: Wed, 26 Sep 2018 15:10:18 -0400 (EDT)
From: Dave Anderson <anderson@redhat.com>
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Subject: Re: [PATCH] makedumpfile/ppc64: increase MAX_PHYSMEM_BITS to > 128TB
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Cc: hbathini@linux.ibm.com


----- Original Message -----
>
> * Required for kernel 4.19
> 
> With kernel commit 7d4340bb92a9 ("powerpc/mm: Increase MAX_PHYSMEM_BITS
> to 128TB with SPARSEMEM_VMEMMAP config"), MAX_PHYSMEM_BITS is bumped up
> to 47. Make the appropriate update here.
> 
> Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
> ---
>  arch/ppc64.c   |    5 +++++
>  makedumpfile.h |    1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/arch/ppc64.c b/arch/ppc64.c
> index 8b6f7d5..947a125 100644
> --- a/arch/ppc64.c
> +++ b/arch/ppc64.c
> @@ -481,6 +481,11 @@ set_ppc64_max_physmem_bits(void)
>  		|| (array_len == (NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT())))
>  		return TRUE;
>  
> +	info->max_physmem_bits  = _MAX_PHYSMEM_BITS_4_19;
> +	if ((array_len == (NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT_EXTREME()))
> +		|| (array_len == (NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT())))
> +		return TRUE;
> +
>  	return FALSE;
>  }
>  
> diff --git a/makedumpfile.h b/makedumpfile.h
> index d1fcd87..46ebe2e 100644
> --- a/makedumpfile.h
> +++ b/makedumpfile.h
> @@ -673,6 +673,7 @@ unsigned long get_kvbase_arm64(void);
>  #define _SECTION_SIZE_BITS	(24)
>  #define _MAX_PHYSMEM_BITS_ORIG  (44)
>  #define _MAX_PHYSMEM_BITS_3_7   (46)
> +#define _MAX_PHYSMEM_BITS_4_19  (47)
>  #define REGION_SHIFT            (60UL)
>  #define VMEMMAP_REGION_ID       (0xfUL)

Hari,

Do you have an accompanying crash utility patch coming along?

Thanks,
  Dave


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