The patch titled
Subject: memory-hotplug: remove memmap of sparse-vmemmap
has been added to the -mm tree. Its filename is
memory-hotplug-remove-memmap-of-sparse-vmemmap.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Subject: memory-hotplug: remove memmap of sparse-vmemmap
Introduce a new API vmemmap_free() to free and remove vmemmap pagetables.
Since pagetable implements are different, each architecture has to provide
its own version of vmemmap_free(), just like vmemmap_populate().
Note: vmemmap_free() is not implemented for ia64, ppc, s390, and sparc.
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Signed-off-by: Jianguo Wu <wujianguo@xxxxxxxxxx>
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Cc: Wu Jianguo <wujianguo@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm64/mm/mmu.c | 3 +++
arch/ia64/mm/discontig.c | 4 ++++
arch/powerpc/mm/init_64.c | 4 ++++
arch/s390/mm/vmem.c | 4 ++++
arch/sparc/mm/init_64.c | 4 ++++
arch/x86/mm/init_64.c | 8 ++++++++
include/linux/mm.h | 1 +
mm/sparse.c | 3 ++-
8 files changed, 30 insertions(+), 1 deletion(-)
diff -puN arch/arm64/mm/mmu.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/arm64/mm/mmu.c
--- a/arch/arm64/mm/mmu.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/arm64/mm/mmu.c
@@ -392,4 +392,7 @@ int __meminit vmemmap_populate(struct pa
return 0;
}
#endif /* CONFIG_ARM64_64K_PAGES */
+void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
diff -puN arch/ia64/mm/discontig.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/ia64/mm/discontig.c
--- a/arch/ia64/mm/discontig.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/ia64/mm/discontig.c
@@ -823,6 +823,10 @@ int __meminit vmemmap_populate(struct pa
return vmemmap_populate_basepages(start_page, size, node);
}
+void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+}
+
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN arch/powerpc/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/powerpc/mm/init_64.c
--- a/arch/powerpc/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/powerpc/mm/init_64.c
@@ -298,6 +298,10 @@ int __meminit vmemmap_populate(struct pa
return 0;
}
+void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+}
+
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN arch/s390/mm/vmem.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/s390/mm/vmem.c
--- a/arch/s390/mm/vmem.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/s390/mm/vmem.c
@@ -272,6 +272,10 @@ out:
return ret;
}
+void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+}
+
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN arch/sparc/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/sparc/mm/init_64.c
--- a/arch/sparc/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/sparc/mm/init_64.c
@@ -2232,6 +2232,10 @@ void __meminit vmemmap_populate_print_la
}
}
+void vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+}
+
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN arch/x86/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/arch/x86/mm/init_64.c
@@ -1309,6 +1309,14 @@ vmemmap_populate(struct page *start_page
return 0;
}
+void __ref vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+ unsigned long start = (unsigned long)memmap;
+ unsigned long end = (unsigned long)(memmap + nr_pages);
+
+ remove_pagetable(start, end, false);
+}
+
void register_page_bootmem_memmap(unsigned long section_nr,
struct page *start_page, unsigned long size)
{
diff -puN include/linux/mm.h~memory-hotplug-remove-memmap-of-sparse-vmemmap include/linux/mm.h
--- a/include/linux/mm.h~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/include/linux/mm.h
@@ -1720,6 +1720,7 @@ int vmemmap_populate_basepages(struct pa
unsigned long pages, int node);
int vmemmap_populate(struct page *start_page, unsigned long pages, int node);
void vmemmap_populate_print_last(void);
+void vmemmap_free(struct page *memmap, unsigned long nr_pages);
void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
unsigned long size);
diff -puN mm/sparse.c~memory-hotplug-remove-memmap-of-sparse-vmemmap mm/sparse.c
--- a/mm/sparse.c~memory-hotplug-remove-memmap-of-sparse-vmemmap
+++ a/mm/sparse.c
@@ -615,10 +615,11 @@ static inline struct page *kmalloc_secti
}
static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages)
{
- return; /* XXX: Not implemented yet */
+ vmemmap_free(memmap, nr_pages);
}
static void free_map_bootmem(struct page *memmap, unsigned long nr_pages)
{
+ vmemmap_free(memmap, nr_pages);
}
#else
static struct page *__kmalloc_section_memmap(unsigned long nr_pages)
_
Patches currently in -mm which might be from tangchen@xxxxxxxxxxxxxx are
memory-hotplug-try-to-offline-the-memory-twice-to-avoid-dependence.patch
memory-hotplug-check-whether-all-memory-blocks-are-offlined-or-not-when-removing-memory.patch
memory-hotplug-remove-redundant-codes.patch
memory-hotplug-remove-sys-firmware-memmap-x-sysfs.patch
memory-hotplug-introduce-new-arch_remove_memory-for-removing-page-table.patch
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap.patch
memory-hotplug-move-pgdat_resize_lock-into-sparse_remove_one_section.patch
memory-hotplug-common-apis-to-support-page-tables-hot-remove.patch
memory-hotplug-common-apis-to-support-page-tables-hot-remove-fix.patch
memory-hotplug-remove-page-table-of-x86_64-architecture.patch
memory-hotplug-remove-page-table-of-x86_64-architecture-fix.patch
memory-hotplug-remove-memmap-of-sparse-vmemmap.patch
memory-hotplug-integrated-__remove_section-of-config_sparsemem_vmemmap.patch
memory_hotplug-clear-zone-when-removing-the-memory.patch
memory-hotplug-remove-sysfs-file-of-node.patch
memory-hotplug-free-node_data-when-a-node-is-offlined.patch
memory-hotplug-do-not-allocate-pdgat-if-it-was-not-freed-when-offline.patch
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