[Crash-utility] [PATCH] Crash-Utility: s390x: Auto-detect the correct MAX_PHYSMEM_BITS used in vmcore being analyzed.

[Dave Anderson]

----- Original Message -----
> Hello Mahesh, Dave,
> 
> I am no expert on memory management, but...
> 
> Mahesh Jagannath Salgaonkar <mahesh at linux.vnet.ibm.com> wrote on
> 12/22/2011
> 10:06:43:
> > > And complicating matters even further, your patch presumes that the
> > > kernel has configured CONFIG_SPARSEMEM_EXTREME in conjunction with
> > > CONFIG_SPARSEMEM.  Would it be possible for an s390x to be configured
> > > with just CONFIG_SPARSEMEM alone?
> >
> > Not sure. I have never tried building s390x kernel configured with just
> > CONFIG_SPARSEMEM alone.
> 
> On s390x CONFIG_SPARSEMEM, CONFIG_SPARSEMEM_EXTREME, and SPARSEMEM_VMEMMAP
> is always enabled.

But old kernels like RHEL4 don't have SPARSEMEM.

Dave