[Crash-utility] [PATCH] CONFIG_SPARSEMEM for s390(x)

[David J. Wilder]

On Tue, 2008-08-12 at 17:12 +0200, Michael Holzheu wrote:
> Hi Dave,
> 
> When starting crash on s390(x) with CONFIG_SPARSEMEM enabled we get the
> following error message:
> 
> crash: CONFIG_SPARSEMEM kernels not supported for this architecture
> 
> The following patch fixes this problem, but I am not sure, if I set
> _MAX_PHYSMEM_BITS to the correct value (I used 31 for s390 and 64 for
> s390x). Could you please explain the meaning of _MAX_PHSYSMEM_BITS?
> ---
> 

_MAX_PHSYSMEM_BITS is the number of physical addressing bits provided by
the hardware.  It is defined as MAX_PHSYSMEM_BITS in asm/sparsemem.h.