Commit 40135fc7 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Andrew Morton
Browse files

mm/vmemmap: allow architectures to override how vmemmap optimization works 

Architectures like powerpc will like to use different page table
allocators and mapping mechanisms to implement vmemmap optimization. 
Similar to vmemmap_populate allow architectures to implement
vmemap_populate_compound_pages

Link: https://lkml.kernel.org/r/20230724190759.483013-5-aneesh.kumar@linux.ibm.com


Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c1a6c536

mm/sparse-vmemmap.c

+3 −0
Original line number Diff line number Diff line
@@ -358,6 +358,7 @@ int __meminit vmemmap_populate_hugepages(unsigned long start, unsigned long end, 
	return 0;

}



#ifndef vmemmap_populate_compound_pages

/*

 * For compound pages bigger than section size (e.g. x86 1G compound

 * pages with 2M subsection size) fill the rest of sections as tail
@@ -446,6 +447,8 @@ static int __meminit vmemmap_populate_compound_pages(unsigned long start_pfn, 
	return 0;

}



#endif



struct page * __meminit __populate_section_memmap(unsigned long pfn,

		unsigned long nr_pages, int nid, struct vmem_altmap *altmap,

		struct dev_pagemap *pgmap)