From: 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: rientjes@google.com, liuj97@gmail.com, len.brown@intel.com,
benh@kernel.crashing.org, paulus@samba.org, cl@linux.com,
minchan.kim@gmail.com, akpm@linux-foundation.org,
kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com,
Wen Congyang <wency@cn.fujitsu.com>
Subject: [RFC v8 PATCH 15/20] memory-hotplug: implement register_page_bootmem_info_section of sparse-vmemmap
Date: Tue, 28 Aug 2012 18:00:22 +0800 [thread overview]
Message-ID: <1346148027-24468-16-git-send-email-wency@cn.fujitsu.com> (raw)
In-Reply-To: <1346148027-24468-1-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: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
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: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Wen Congyang <wency@cn.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 | 2 +
include/linux/mm.h | 3 +-
mm/memory_hotplug.c | 31 +++++++++++++++++++++--
8 files changed, 108 insertions(+), 4 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 620b7ac..3690c44 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -298,5 +298,11 @@ 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 6f896e7..eda55cd 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -227,6 +227,12 @@ 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 d58edf5..add1cc7 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2077,6 +2077,12 @@ 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 e0d88ba..0075592 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -1138,6 +1138,58 @@ 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 1133e63..2d18235 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -164,6 +164,8 @@ static inline void arch_refresh_nodedata(int nid, pg_data_t *pgdat)
extern void register_page_bootmem_info_node(struct pglist_data *pgdat);
extern void put_page_bootmem(struct page *page);
+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 311be90..c607913 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1618,7 +1618,8 @@ 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 3ca66bc..d8495ff 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -91,8 +91,8 @@ static void release_memory_resource(struct resource *res)
}
#ifdef CONFIG_MEMORY_HOTPLUG_SPARSE
-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)
{
unsigned long page_type;
@@ -164,8 +164,33 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
}
#else
-static inline void register_page_bootmem_info_section(unsigned long start_pfn)
+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
--
1.7.1
next prev parent reply other threads:[~2012-08-28 10:02 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-28 10:00 [RFC v8 PATCH 00/20] memory-hotplug: hot-remove physical memory wency
2012-08-28 10:00 ` [RFC v8 PATCH 01/20] memory-hotplug: rename remove_memory() to offline_memory()/offline_pages() wency
2012-08-28 10:00 ` [RFC v8 PATCH 02/20] memory-hotplug: implement offline_memory() wency
2012-08-28 10:00 ` [RFC v8 PATCH 03/20] memory-hotplug: store the node id in acpi_memory_device wency
2012-08-28 10:00 ` [RFC v8 PATCH 04/20] memory-hotplug: offline and remove memory when removing the memory device wency
2012-08-31 20:55 ` Andrew Morton
2012-09-03 1:30 ` Wen Congyang
2012-08-28 10:00 ` [RFC v8 PATCH 05/20] memory-hotplug: check whether memory is present or not wency
2012-08-28 10:00 ` [RFC v8 PATCH 06/20] memory-hotplug: export the function acpi_bus_remove() wency
2012-08-28 10:00 ` [RFC v8 PATCH 07/20] memory-hotplug: call acpi_bus_remove() to remove memory device wency
2012-08-28 10:00 ` [RFC v8 PATCH 08/20] memory-hotplug: remove /sys/firmware/memmap/X sysfs wency
2012-08-31 21:06 ` Andrew Morton
2012-09-03 5:51 ` Wen Congyang
2012-09-04 23:16 ` Andrew Morton
2012-09-05 1:41 ` Wen Congyang
2012-09-03 7:31 ` Wen Congyang
2012-08-28 10:00 ` [RFC v8 PATCH 09/20] memory-hotplug: does not release memory region in PAGES_PER_SECTION chunks wency
2012-08-28 10:00 ` [RFC v8 PATCH 10/20] memory-hotplug: add memory_block_release wency
2012-08-28 10:00 ` [RFC v8 PATCH 11/20] memory-hotplug: remove_memory calls __remove_pages wency
2012-08-28 10:00 ` [RFC v8 PATCH 12/20] memory-hotplug: introduce new function arch_remove_memory() wency
2012-08-28 10:00 ` [RFC v8 PATCH 13/20] memory-hotplug: check page type in get_page_bootmem wency
2012-08-31 21:30 ` Andrew Morton
2012-09-04 3:46 ` Wen Congyang
2012-09-04 9:54 ` Yasuaki Ishimatsu
2012-08-28 10:00 ` [RFC v8 PATCH 14/20] memory-hotplug: move register_page_bootmem_info_node and put_page_bootmem for sparse-vmemmap wency
2012-08-28 10:00 ` wency [this message]
2012-08-28 10:00 ` [RFC v8 PATCH 16/20] memory-hotplug: free memmap of sparse-vmemmap wency
2012-08-28 10:00 ` [RFC v8 PATCH 17/20] memory_hotplug: clear zone when the memory is removed wency
2012-08-28 10:00 ` [RFC v8 PATCH 18/20] memory-hotplug: add node_device_release wency
2012-08-28 10:00 ` [RFC v8 PATCH 19/20] memory-hotplug: remove sysfs file of node wency
2012-08-28 10:00 ` [RFC v8 PATCH 20/20] memory-hotplug: clear hwpoisoned flag when onlining pages wency
2012-08-31 20:49 ` [RFC v8 PATCH 00/20] memory-hotplug: hot-remove physical memory Andrew Morton
2012-09-10 1:46 ` Yasuaki Ishimatsu
2012-09-10 2:01 ` Wen Congyang
2012-09-10 13:52 ` Vasilis Liaskovitis
[not found] ` <CAAV+Mu7YWRWnxt78F4ZDMrrUsWB=n-_qkYOcQT7WQ2HwP89Obw@mail.gmail.com>
2012-09-11 1:23 ` Minchan Kim
[not found] ` <CAAV+Mu4hb0qbW2Ry6w5FAGUM06puDH0v_H-jr584-G9CzJqSGw@mail.gmail.com>
2012-09-11 5:39 ` Wen Congyang
2012-09-12 6:17 ` Minchan Kim
2012-09-11 1:25 ` Wen Congyang
2012-09-12 5:20 ` Wen Congyang
2012-09-12 17:18 ` Vasilis Liaskovitis
2012-09-18 9:39 ` Wen Congyang
2012-09-19 17:02 ` Vasilis Liaskovitis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1346148027-24468-16-git-send-email-wency@cn.fujitsu.com \
--to=wency@cn.fujitsu.com \
--cc=akpm@linux-foundation.org \
--cc=benh@kernel.crashing.org \
--cc=cl@linux.com \
--cc=cmetcalf@tilera.com \
--cc=isimatu.yasuaki@jp.fujitsu.com \
--cc=kosaki.motohiro@jp.fujitsu.com \
--cc=len.brown@intel.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-ia64@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux-sh@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=liuj97@gmail.com \
--cc=minchan.kim@gmail.com \
--cc=paulus@samba.org \
--cc=rientjes@google.com \
--cc=sparclinux@vger.kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).