On Thu, Jan 20, 2011 at 09:20:47AM -0800, Dave Hansen wrote: > This problem actually exists without sparsemem, too. Discontigmem (at > least) does it as well. We don't expect banks to cross sparsemem boundaries, or the older discontigmem nodes (esp. as we used to store the node number.) Discontigmem support has been removed now so that doesn't apply anymore. > 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>