The patch titled
Subject: fold me "mm: consider zone which is not fully populated to have holes"
has been added to the -mm tree. Its filename is
mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix.patch
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------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: fold me "mm: consider zone which is not fully populated to have holes"
- check valid section number in pfn_to_online_page - Vlastimil
- mark sections online after all struct pages are initialized in
online_pages_range - Vlastimil
Link: http://lkml.kernel.org/r/20170518164210.GD18333@xxxxxxxxxxxxxx
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memory_hotplug.h | 3 ++-
mm/memory_hotplug.c | 5 +++--
2 files changed, 5 insertions(+), 3 deletions(-)
diff -puN include/linux/memory_hotplug.h~mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix include/linux/memory_hotplug.h
--- a/include/linux/memory_hotplug.h~mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix
+++ a/include/linux/memory_hotplug.h
@@ -22,8 +22,9 @@ struct resource;
#define pfn_to_online_page(pfn) \
({ \
struct page *___page = NULL; \
+ unsigned long ___nr = pfn_to_section_nr(pfn); \
\
- if (online_section_nr(pfn_to_section_nr(pfn))) \
+ if (___nr < NR_MEM_SECTIONS && online_section_nr(___nr))\
___page = pfn_to_page(pfn); \
___page; \
})
diff -puN mm/memory_hotplug.c~mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix
+++ a/mm/memory_hotplug.c
@@ -930,8 +930,6 @@ static int online_pages_range(unsigned l
unsigned long onlined_pages = *(unsigned long *)arg;
struct page *page;
- online_mem_sections(start_pfn, start_pfn + nr_pages);
-
if (PageReserved(pfn_to_page(start_pfn)))
for (i = 0; i < nr_pages; i++) {
page = pfn_to_page(start_pfn + i);
@@ -942,6 +940,9 @@ static int online_pages_range(unsigned l
(*online_page_callback)(page);
onlined_pages++;
}
+
+ online_mem_sections(start_pfn, start_pfn + nr_pages);
+
*(unsigned long *)arg = onlined_pages;
return 0;
}
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
include-linux-gfph-fix-___gfp_nolockdep-value.patch
mm-clarify-why-we-want-kmalloc-before-falling-backto-vmallock.patch
mm-remove-return-value-from-init_currently_empty_zone.patch
mm-memory_hotplug-use-node-instead-of-zone-in-can_online_high_movable.patch
mm-drop-page_initialized-check-from-get_nid_for_pfn.patch
mm-memory_hotplug-get-rid-of-is_zone_device_section.patch
mm-memory_hotplug-split-up-register_one_node.patch
mm-memory_hotplug-consider-offline-memblocks-removable.patch
mm-consider-zone-which-is-not-fully-populated-to-have-holes.patch
mm-consider-zone-which-is-not-fully-populated-to-have-holes-fix.patch
mm-compaction-skip-over-holes-in-__reset_isolation_suitable.patch
mm-__first_valid_page-skip-over-offline-pages.patch
mm-vmstat-skip-reporting-offline-pages-in-pagetypeinfo.patch
mm-memory_hotplug-do-not-associate-hotadded-memory-to-zones-until-online.patch
mm-memory_hotplug-replace-for_device-by-want_memblock-in-arch_add_memory.patch
mm-memory_hotplug-fix-the-section-mismatch-warning.patch
mm-memory_hotplug-remove-unused-cruft-after-memory-hotplug-rework.patch
mm-adaptive-hash-table-scaling-fix.patch
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