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SubjectRe: [PATCHv7 01/19] mm/sparsemem: Allocate mem_section at runtime for SPARSEMEM_EXTREME

* Kirill A. Shutemov <> wrote:

> Size of mem_section array depends on size of physical address space.
> In preparation for boot-time switching between paging modes on x86-64
> we need to make allocation of mem_section dynamic.
> The patch allocates the array on the first call to
> sparse_memory_present_with_active_regions().
> Signed-off-by: Kirill A. Shutemov <>

What is the size of the allocations here, in bytes, for the two main variants?



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