Re: [Crash-utility] Throw read error on vmcore produced by ARM soc.

On Thu, Mar 28, 2013 at 11:37:34AM -0400, Dave Anderson wrote: > I don't know about the arm_ioremap issue -- that's for the ARM guys to > answer. Not really. Basically, we don't support ioremapping of areas of RAM already mapped elsewhere by the kernel. In other words, if RAM is part of the kernel's memory map, then ioremap() is forbidden. Why? Because if we were to allow it, we'd end up with conflicting mappings being created, which is a violation of the architecture requirements. The quoted pfn_valid() implementation isn't used if the memory map has holes in it - as selected by: config HAVE_ARCH_PFN_VALID def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM Maybe that also needs to be enabled with crashkernels if they also provide a memory map which has holes in?

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