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mm/sparsemem: prepare for sub-section ranges

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Prepare the memory hot-{add,remove} paths for handling sub-section
ranges by plumbing the starting page frame and number of pages being
handled through arch_{add,remove}_memory() to
sparse_{add,remove}_one_section().

This is simply plumbing, small cleanups, and some identifier renames.
No intended functional changes.

Link: http://lkml.kernel.org/r/156092353780.979959.9713046515562743194.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>	[ppc64]
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Logan Gunthorpe <logang@deltatee.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jane Chu <jane.chu@oracle.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Wei Yang <richardw.yang@linux.intel.com>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Williams
2019-07-18 15:58:22 -07:00
committed by Linus Torvalds
parent 46d945aeab
commit 7ea6216049
3 changed files with 81 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
mm/sparse.c
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@@ -728,8 +728,8 @@ static void free_map_bootmem(struct page *memmap)
* * -EEXIST - Section has been present.
* * -ENOMEM - Out of memory.
*/
int __meminit sparse_add_one_section(int nid, unsigned long start_pfn,
struct vmem_altmap *altmap)
int __meminit sparse_add_section(int nid, unsigned long start_pfn,
unsigned long nr_pages, struct vmem_altmap *altmap)
{
unsigned long section_nr = pfn_to_section_nr(start_pfn);
struct mem_section_usage *usage;
@@ -835,8 +835,9 @@ static void free_section_usage(struct mem_section *ms, struct page *memmap,
free_map_bootmem(memmap);
}
void sparse_remove_one_section(struct mem_section *ms, unsigned long map_offset,
struct vmem_altmap *altmap)
void sparse_remove_one_section(struct mem_section *ms, unsigned long pfn,
unsigned long nr_pages, unsigned long map_offset,
struct vmem_altmap *altmap)
{
struct page *memmap = NULL;
struct mem_section_usage *usage = NULL;
@@ -849,10 +850,7 @@ void sparse_remove_one_section(struct mem_section *ms, unsigned long map_offset,
ms->usage = NULL;
}
clear_hwpoisoned_pages(memmap + map_offset,
PAGES_PER_SECTION - map_offset);
free_section_usage(ms, memmap, usage,
section_nr_to_pfn(__section_nr(ms)),
PAGES_PER_SECTION, altmap);
clear_hwpoisoned_pages(memmap + map_offset, nr_pages - map_offset);
free_section_usage(ms, memmap, usage, pfn, nr_pages, altmap);
}
#endif /* CONFIG_MEMORY_HOTPLUG */