Re: [PATCH 4/6] x86/mem-hotplug: Support initialize page tablesbottom up

[Tejun Heo]

On Tue, Sep 24, 2013 at 09:23:48PM +0800, Zhang Yanfei wrote:
> > Hmm... so, this is kinda weird.  We're doing it in two chunks and
> > mapping memory between ISA_END_ADDRESS and kernel_end right on top of
> > ISA_END_ADDRESS?  Can't you give enough information to the mapping
> > function so that it can map everything on top of kernel_end in single
> > go?
> 
> You mean we should call memory_map_bottom_up like this:
> 
> memory_map_bottom_up(ISA_END_ADDRESS, end)
> 
> right?

But that wouldn't be ideal as we want the page tables above kernel
image and the above would allocate it above ISA_END_ADDRESS, right?
Maybe memory_map_bottom_up() should take extra parameters for where to
allocate page tables at separately from the mapping range and treat it
specially?  Would that make the function a lot more complex?

Thanks.

-- 
tejun
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