From: Wen Congyang <wency@cn.fujitsu.com>
To: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org,
linux-s390@vger.kernel.org, linux-sh@vger.kernel.org,
linux-ia64@vger.kernel.org, cmetcalf@tilera.com,
sparclinux@vger.kernel.org
Cc: Len Brown <len.brown@intel.com>,
Wen Congyang <wency@cn.fujitsu.com>,
Jianguo Wu <wujianguo@huawei.com>,
Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>,
paulus@samba.org, Minchan Kim <minchan.kim@gmail.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
David Rientjes <rientjes@google.com>,
Christoph Lameter <cl@linux.com>,
Andrew Morton <akpm@linux-foundation.org>,
Jiang Liu <liuj97@gmail.com>
Subject: [PATCH v3 07/12] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap
Date: Thu, 1 Nov 2012 17:44:38 +0800 [thread overview]
Message-ID: <1351763083-7905-8-git-send-email-wency@cn.fujitsu.com> (raw)
In-Reply-To: <1351763083-7905-1-git-send-email-wency@cn.fujitsu.com>
From: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
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.
CC: David Rientjes <rientjes@google.com>
CC: Jiang Liu <liuj97@gmail.com>
CC: Len Brown <len.brown@intel.com>
CC: Christoph Lameter <cl@linux.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
---
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 | 52 ++++++++++++++++++++++++++++++++++++++++++
include/linux/memory_hotplug.h | 11 ++-------
include/linux/mm.h | 3 ++-
mm/memory_hotplug.c | 37 ++++++++++++++++++++++++++----
8 files changed, 113 insertions(+), 14 deletions(-)
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index c641333..33943db 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -822,4 +822,10 @@ int __meminit vmemmap_populate(struct page *start_page,
{
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 --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 95a4529..6466440 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -297,5 +297,11 @@ int __meminit vmemmap_populate(struct page *start_page,
return 0;
}
+
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ /* TODO */
+}
#endif /* CONFIG_SPARSEMEM_VMEMMAP */
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 387c7c6..4f4803a 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -236,6 +236,12 @@ 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 --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 9e28a11..75a984b 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2231,6 +2231,12 @@ void __meminit vmemmap_populate_print_last(void)
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 --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 5675335..795dae3 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -998,6 +998,58 @@ vmemmap_populate(struct page *start_page, unsigned long size, int node)
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;
+
+ 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;
+ get_page_bootmem(section_nr, pmd_page(*pmd),
+ SECTION_INFO);
+ }
+ }
+}
+
void __meminit vmemmap_populate_print_last(void)
{
if (p_start) {
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 191b2d9..d4c4402 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -163,17 +163,10 @@ static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
#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 --git a/include/linux/mm.h b/include/linux/mm.h
index fa06804..8e5a56f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1640,7 +1640,8 @@ int vmemmap_populate_basepages(struct page *start_page,
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 --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 66a79a7..db9806c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -91,9 +91,8 @@ static void release_memory_resource(struct resource *res)
}
#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);
@@ -127,6 +126,7 @@ void __ref put_page_bootmem(struct page *page)
}
+#ifndef CONFIG_SPARSEMEM_VMEMMAP
static void register_page_bootmem_info_section(unsigned long start_pfn)
{
unsigned long *usemap, mapsize, section_nr, i;
@@ -160,6 +160,36 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
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);
+
+ page = virt_to_page(memmap);
+ mapsize = sizeof(struct page) * PAGES_PER_SECTION;
+ mapsize = PAGE_ALIGN(mapsize) >> PAGE_SHIFT;
+
+ 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)
{
@@ -202,7 +232,6 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
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)
--
1.8.0
next prev parent reply other threads:[~2012-11-01 9:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-01 9:44 [PATCH v3 00/12] memory-hotplug: hot-remove physical memory Wen Congyang
2012-11-01 9:44 ` [PATCH v3 01/12] memory-hotplug: try to offline the memory twice to avoid dependence Wen Congyang
2012-11-01 9:44 ` [PATCH v3 02/12] memory-hotplug: check whether all memory blocks are offlined or not when removing memory Wen Congyang
2012-11-01 9:44 ` [PATCH v3 03/12] memory-hotplug: remove redundant codes Wen Congyang
2012-11-01 9:44 ` [PATCH v3 04/12] memory-hotplug: remove /sys/firmware/memmap/X sysfs Wen Congyang
2012-11-01 9:44 ` [PATCH v3 05/12] memory-hotplug: introduce new function arch_remove_memory() for removing page table depends on architecture Wen Congyang
2012-11-01 9:44 ` [PATCH v3 06/12] memory-hotplug: unregister memory section on SPARSEMEM_VMEMMAP Wen Congyang
2012-11-20 6:22 ` Jaegeuk Hanse
2012-11-20 6:55 ` Wen Congyang
2012-11-20 6:58 ` Jaegeuk Hanse
2012-11-20 9:37 ` Wen Congyang
2012-11-20 11:03 ` Jaegeuk Hanse
2012-11-20 11:16 ` Jaegeuk Hanse
2012-11-21 3:05 ` Wen Congyang
2012-11-21 4:22 ` Jaegeuk Hanse
2012-11-21 4:42 ` Wen Congyang
2012-11-21 5:03 ` Jaegeuk Hanse
2012-11-21 5:12 ` Wen Congyang
2012-11-21 5:28 ` Wen Congyang
2012-11-01 9:44 ` Wen Congyang [this message]
2012-11-01 9:44 ` [PATCH v3 08/12] memory-hotplug: remove memmap of sparse-vmemmap Wen Congyang
2012-11-27 5:47 ` Jianguo Wu
2012-11-27 6:39 ` Wen Congyang
2012-11-27 6:49 ` Wen Congyang
2012-11-27 7:14 ` Jianguo Wu
2012-11-01 9:44 ` [PATCH v3 09/12] memory-hotplug: remove page table of x86_64 architecture Wen Congyang
2012-11-01 9:44 ` [PATCH v3 10/12] memory-hotplug: memory_hotplug: clear zone when removing the memory Wen Congyang
2012-11-01 9:44 ` [PATCH v3 11/12] memory-hotplug: remove sysfs file of node Wen Congyang
2012-11-19 10:08 ` Yasuaki Ishimatsu
2012-11-20 9:35 ` Wen Congyang
2012-11-26 14:27 ` Jianguo Wu
2012-11-27 2:24 ` Wen Congyang
2012-11-01 9:44 ` [PATCH v3 12/12] memory-hotplug: free node_data when a node is offlined Wen Congyang
2012-11-16 11:55 ` [PATCH v3 00/12] memory-hotplug: hot-remove physical memory Wen Congyang
2012-11-22 1:33 ` Yasuaki Ishimatsu
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