On Thu, Jan 20, 2011 at 10:11:27AM -0800, Dave Hansen wrote: > On Thu, 2011-01-20 at 18:01 +0000, Russell King - ARM Linux wrote: > > > The x86 version of show_mem() actually manages to do this without any > > > #ifdefs, and works for a ton of configuration options. It uses > > > pfn_valid() to tell whether it can touch a given pfn. > > > > x86 memory layout tends to be very simple as it expects memory to > > start at the beginning of every region described by a pgdat and extend > > in one contiguous block. I wish ARM was that simple. > > x86 memory layouts can be pretty funky and have been that way for a long > time. That's why we *have* to handle holes in x86's show_mem(). My > laptop even has a ~1GB hole in its ZONE_DMA32: If x86 is soo funky, I suggest you try the x86 version of show_mem() on an ARM platform with memory holes. Make sure you try it with sparsemem as well... -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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