Re: [PATCH] mem-hotplug: let memblock skip the hotpluggable memory regions in __next_mem_range()

[Tejun Heo]

On Mon, Aug 11, 2014 at 09:31:22PM +0800, Xishi Qiu wrote:
> Let memblock skip the hotpluggable memory regions in __next_mem_range(),
> it is used to to prevent memblock from allocating hotpluggable memory 
> for the kernel at early time. The code is the same as __next_mem_range_rev().
> 
> Clear hotpluggable flag before releasing free pages to the buddy allocator.

Please try to explain "why" in addition to "what".  Why do we need to
clear hotpluggable flag in free_low_memory_core_early() in addition to
numa_clear_node_hotplug() in x86 numa.c?  Does this make x86 code
redundant?  If not, why?

-- 
tejun
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