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SubjectRe: [PATCH 4.14 023/159] mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y
On Mon, Jan 08, 2018 at 04:04:44PM +0000, Ingo Molnar wrote:
>
> hi Kirill,
>
> As Mike reported it below, your 5-level paging related upstream commit
> 83e3c48729d9 and all its followup fixes:
>
> 83e3c48729d9: mm/sparsemem: Allocate mem_section at runtime for CONFIG_SPARSEMEM_EXTREME=y
> 629a359bdb0e: mm/sparsemem: Fix ARM64 boot crash when CONFIG_SPARSEMEM_EXTREME=y
> d09cfbbfa0f7: mm/sparse.c: wrong allocation for mem_section
>
> ... still breaks kexec - and that now regresses -stable as well.
>
> Given that 5-level paging now syntactically depends on having this commit, if we
> fully revert this then we'll have to disable 5-level paging as well.

Urghh.. Sorry about this.

I'm on vacation right now. Give me a day to sort this out.

--
Kirill A. Shutemov

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