The patch titled
Subject: memory-hotplug: introduce CONFIG_HAVE_BOOTMEM_INFO_NODE and revert register_page_bootmem_info_node() when platform not support
has been added to the -mm tree. Its filename is
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix.patch
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------------------------------------------------------
From: Lin Feng <linfeng@xxxxxxxxxxxxxx>
Subject: memory-hotplug: introduce CONFIG_HAVE_BOOTMEM_INFO_NODE and revert register_page_bootmem_info_node() when platform not support
It's implemented by adding a new Kconfig option named
CONFIG_HAVE_BOOTMEM_INFO_NODE, which will be automatically selected by
memory-hotplug feature fully supported archs(currently only on x86_64).
Signed-off-by: Lin Feng <linfeng@xxxxxxxxxxxxxx>
Reported-by: Michal Hocko <mhocko@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/mm/init_64.c | 2 +-
include/linux/memory_hotplug.h | 6 ++++++
mm/Kconfig | 8 ++++++++
mm/memory_hotplug.c | 2 ++
4 files changed, 17 insertions(+), 1 deletion(-)
diff -puN arch/x86/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix
+++ a/arch/x86/mm/init_64.c
@@ -1000,7 +1000,7 @@ vmemmap_populate(struct page *start_page
return 0;
}
-#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
+#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HAVE_BOOTMEM_INFO_NODE)
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN include/linux/memory_hotplug.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix include/linux/memory_hotplug.h
--- a/include/linux/memory_hotplug.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix
+++ a/include/linux/memory_hotplug.h
@@ -174,7 +174,13 @@ static inline void arch_refresh_nodedata
#endif /* CONFIG_NUMA */
#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
+#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
extern void register_page_bootmem_info_node(struct pglist_data *pgdat);
+#else
+static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
+{
+}
+#endif
extern void put_page_bootmem(struct page *page);
extern void get_page_bootmem(unsigned long ingo, struct page *page,
unsigned long type);
diff -puN mm/Kconfig~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix mm/Kconfig
--- a/mm/Kconfig~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix
+++ a/mm/Kconfig
@@ -162,10 +162,18 @@ config MOVABLE_NODE
Say Y here if you want to hotplug a whole node.
Say N here if you want kernel to use memory on all nodes evenly.
+#
+# Only be set on architectures that have completely implemented memory hotplug
+# feature. If you are not sure, don't touch it.
+#
+config HAVE_BOOTMEM_INFO_NODE
+ def_bool n
+
# eventually, we can have this option just 'select SPARSEMEM'
config MEMORY_HOTPLUG
bool "Allow for memory hot-add"
select MEMORY_ISOLATION
+ select HAVE_BOOTMEM_INFO_NODE if X86_64
depends on SPARSEMEM || X86_64_ACPI_NUMA
depends on HOTPLUG && ARCH_ENABLE_MEMORY_HOTPLUG
depends on (IA64 || X86 || PPC_BOOK3S_64 || SUPERH || S390)
diff -puN mm/memory_hotplug.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix
+++ a/mm/memory_hotplug.c
@@ -188,6 +188,7 @@ static void register_page_bootmem_info_s
}
#endif
+#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
unsigned long i, pfn, end_pfn, nr_pages;
@@ -229,6 +230,7 @@ void register_page_bootmem_info_node(str
register_page_bootmem_info_section(pfn);
}
}
+#endif
static void grow_zone_span(struct zone *zone, unsigned long start_pfn,
unsigned long end_pfn)
_
Patches currently in -mm which might be from linfeng@xxxxxxxxxxxxxx are
origin.patch
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix.patch
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix.patch
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap-fix-fix-fix.patch
memory-hotplug-remove-memmap-of-sparse-vmemmap-fix.patch
page_alloc-add-movable_memmap-kernel-parameter.patch
page_alloc-introduce-zone_movable_limit-to-keep-movable-limit-for-nodes.patch
page_alloc-make-movablecore_map-has-higher-priority.patch
page_alloc-bootmem-limit-with-movablecore_map.patch
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