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

[Tejun Heo]

On Tue, Sep 24, 2013 at 09:53:47PM +0800, Zhang Yanfei wrote:
> OK, this is just because we allocate pagtables just above the kernel.
> And if we use up the BRK space that is reserved for inital pagetables,
> we will use memblock to allocate memory for pagetables, and the memory
> allocated here should be mapped already. So we first map [kernel_end, end)
> to make memory above the kernel be mapped as soon as possible. And then
> use pagetables allocated above the kernel to map [ISA_END_ADDRESS, kernel_end).

I see.  The code seems fine to me then.  Can you please add comment
explaining why the split calls are necessary?

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/