The patch titled
Subject: memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap
has been added to the -mm tree. Its filename is
memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap.patch
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------------------------------------------------------
From: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Subject: memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap
For removing memmap region of sparse-vmemmap which is allocated bootmem,
memmap region of sparse-vmemmap needs to be registered by
get_page_bootmem(). So the patch searches pages of virtual mapping and
registers the pages by get_page_bootmem().
Note: register_page_bootmem_memmap() is not implemented for ia64, ppc, s390,
and sparc.
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Signed-off-by: Tang Chen <tangchen@xxxxxxxxxxxxxx>
Reviewed-by: Wu Jianguo <wujianguo@xxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Cc: Jiang Liu <jiang.liu@xxxxxxxxxx>
Cc: Jianguo Wu <wujianguo@xxxxxxxxxx>
Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/mm/discontig.c | 6 +++
arch/powerpc/mm/init_64.c | 6 +++
arch/s390/mm/vmem.c | 6 +++
arch/sparc/mm/init_64.c | 6 +++
arch/x86/mm/init_64.c | 58 +++++++++++++++++++++++++++++++
include/linux/memory_hotplug.h | 11 +----
include/linux/mm.h | 3 +
mm/memory_hotplug.c | 33 +++++++++++++++--
8 files changed, 115 insertions(+), 14 deletions(-)
diff -puN arch/ia64/mm/discontig.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap arch/ia64/mm/discontig.c
--- a/arch/ia64/mm/discontig.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/arch/ia64/mm/discontig.c
@@ -822,4 +822,10 @@ int __meminit vmemmap_populate(struct pa
{
return vmemmap_populate_basepages(start_page, size, node);
}
+
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ /* TODO */
+}
#endif
diff -puN arch/powerpc/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap arch/powerpc/mm/init_64.c
--- a/arch/powerpc/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/arch/powerpc/mm/init_64.c
@@ -297,5 +297,11 @@ int __meminit vmemmap_populate(struct pa
return 0;
}
+
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ /* TODO */
+}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
diff -puN arch/s390/mm/vmem.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap arch/s390/mm/vmem.c
--- a/arch/s390/mm/vmem.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/arch/s390/mm/vmem.c
@@ -272,6 +272,12 @@ out:
return ret;
}
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ /* TODO */
+}
+
/*
* Add memory segment to the segment list if it doesn't overlap with
* an already present segment.
diff -puN arch/sparc/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap arch/sparc/mm/init_64.c
--- a/arch/sparc/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/arch/sparc/mm/init_64.c
@@ -2231,6 +2231,12 @@ void __meminit vmemmap_populate_print_la
node_start = 0;
}
}
+
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ /* TODO */
+}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
static void prot_init_common(unsigned long page_none,
diff -puN arch/x86/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/arch/x86/mm/init_64.c
@@ -1000,6 +1000,64 @@ vmemmap_populate(struct page *start_page
return 0;
}
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ unsigned long addr = (unsigned long)start_page;
+ unsigned long end = (unsigned long)(start_page + size);
+ unsigned long next;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ unsigned int nr_pages;
+ struct page *page;
+
+ for (; addr < end; addr = next) {
+ pte_t *pte = NULL;
+
+ pgd = pgd_offset_k(addr);
+ if (pgd_none(*pgd)) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ continue;
+ }
+ get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO);
+
+ pud = pud_offset(pgd, addr);
+ if (pud_none(*pud)) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ continue;
+ }
+ get_page_bootmem(section_nr, pud_page(*pud), MIX_SECTION_INFO);
+
+ if (!cpu_has_pse) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ continue;
+ get_page_bootmem(section_nr, pmd_page(*pmd),
+ MIX_SECTION_INFO);
+
+ pte = pte_offset_kernel(pmd, addr);
+ if (pte_none(*pte))
+ continue;
+ get_page_bootmem(section_nr, pte_page(*pte),
+ SECTION_INFO);
+ } else {
+ next = pmd_addr_end(addr, end);
+
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ continue;
+
+ nr_pages = 1 << (get_order(PMD_SIZE));
+ page = pmd_page(*pmd);
+ while (nr_pages--)
+ get_page_bootmem(section_nr, page++,
+ SECTION_INFO);
+ }
+ }
+}
+
void __meminit vmemmap_populate_print_last(void)
{
if (p_start) {
diff -puN include/linux/memory_hotplug.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap include/linux/memory_hotplug.h
--- a/include/linux/memory_hotplug.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/include/linux/memory_hotplug.h
@@ -174,17 +174,10 @@ static inline void arch_refresh_nodedata
#endif /* CONFIG_NUMA */
#endif /* CONFIG_HAVE_ARCH_NODEDATA_EXTENSION */
-#ifdef CONFIG_SPARSEMEM_VMEMMAP
-static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
-{
-}
-static inline void put_page_bootmem(struct page *page)
-{
-}
-#else
extern void register_page_bootmem_info_node(struct pglist_data *pgdat);
extern void put_page_bootmem(struct page *page);
-#endif
+extern void get_page_bootmem(unsigned long ingo, struct page *page,
+ unsigned long type);
/*
* Lock for memory hotplug guarantees 1) all callbacks for memory hotplug
diff -puN include/linux/mm.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap include/linux/mm.h
--- a/include/linux/mm.h~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/include/linux/mm.h
@@ -1720,7 +1720,8 @@ 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 register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
+ unsigned long size);
enum mf_flags {
MF_COUNT_INCREASED = 1 << 0,
diff -puN mm/memory_hotplug.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~memory-hotplug-implement-register_page_bootmem_info_section-of-sparse-vmemmap
+++ a/mm/memory_hotplug.c
@@ -91,9 +91,8 @@ static void release_memory_resource(stru
}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
-#ifndef CONFIG_SPARSEMEM_VMEMMAP
-static void get_page_bootmem(unsigned long info, struct page *page,
- unsigned long type)
+void get_page_bootmem(unsigned long info, struct page *page,
+ unsigned long type)
{
page->lru.next = (struct list_head *) type;
SetPagePrivate(page);
@@ -128,6 +127,7 @@ void __ref put_page_bootmem(struct page
}
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
static void register_page_bootmem_info_section(unsigned long start_pfn)
{
unsigned long *usemap, mapsize, section_nr, i;
@@ -161,6 +161,32 @@ static void register_page_bootmem_info_s
get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
}
+#else
+static void register_page_bootmem_info_section(unsigned long start_pfn)
+{
+ unsigned long *usemap, mapsize, section_nr, i;
+ struct mem_section *ms;
+ struct page *page, *memmap;
+
+ if (!pfn_valid(start_pfn))
+ return;
+
+ section_nr = pfn_to_section_nr(start_pfn);
+ ms = __nr_to_section(section_nr);
+
+ memmap = sparse_decode_mem_map(ms->section_mem_map, section_nr);
+
+ register_page_bootmem_memmap(section_nr, memmap, PAGES_PER_SECTION);
+
+ usemap = __nr_to_section(section_nr)->pageblock_flags;
+ page = virt_to_page(usemap);
+
+ mapsize = PAGE_ALIGN(usemap_size()) >> PAGE_SHIFT;
+
+ for (i = 0; i < mapsize; i++, page++)
+ get_page_bootmem(section_nr, page, MIX_SECTION_INFO);
+}
+#endif
void register_page_bootmem_info_node(struct pglist_data *pgdat)
{
@@ -203,7 +229,6 @@ void register_page_bootmem_info_node(str
register_page_bootmem_info_section(pfn);
}
}
-#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
static void grow_zone_span(struct zone *zone, unsigned long start_pfn,
unsigned long end_pfn)
_
Patches currently in -mm which might be from isimatu.yasuaki@xxxxxxxxxxxxxx are
x86-fix-the-argument-passed-to-sync_global_pgds.patch
x86-make-mem=-option-to-work-for-efi-platform.patch
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-remove-page-table-of-x86_64-architecture.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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