| Message ID | 50068AB9.20005@jp.fujitsu.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
At 07/18/2012 06:06 PM, Yasuaki Ishimatsu Wrote: > acpi_memory_device_remove() has been prepared to remove physical memory. > But, the function only frees acpi_memory_device currentlry. > > The patch adds following functions into acpi_memory_device_remove(): > - offline memory > - remove physical memory. It only check whether memory is online or not. > - free acpi_memory_device > > 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> > CC: Wen Congyang <wency@cn.fujitsu.com> > Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> > > --- > drivers/acpi/acpi_memhotplug.c | 27 ++++++++++++++++++++++++++- > drivers/base/memory.c | 39 +++++++++++++++++++++++++++++++++++++++ > include/linux/memory.h | 5 +++++ > include/linux/memory_hotplug.h | 5 +++++ > mm/memory_hotplug.c | 22 ++++++++++++++++++++++ > 5 files changed, 97 insertions(+), 1 deletion(-) > > Index: linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c > =================================================================== > --- linux-3.5-rc6.orig/drivers/acpi/acpi_memhotplug.c 2012-07-17 11:20:15.117796971 +0900 > +++ linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c 2012-07-17 13:36:30.325594022 +0900 > @@ -29,6 +29,7 @@ > #include <linux/module.h> > #include <linux/init.h> > #include <linux/types.h> > +#include <linux/memory.h> > #include <linux/memory_hotplug.h> > #include <linux/slab.h> > #include <acpi/acpi_drivers.h> > @@ -452,12 +453,36 @@ static int acpi_memory_device_add(struct > static int acpi_memory_device_remove(struct acpi_device *device, int type) > { > struct acpi_memory_device *mem_device = NULL; > - > + struct acpi_memory_info *info, *tmp; > + int result; > + int node; > > if (!device || !acpi_driver_data(device)) > return -EINVAL; > > mem_device = acpi_driver_data(device); > + > + node = acpi_get_node(mem_device->device->handle); > + list_for_each_entry_safe(info, tmp, &mem_device->res_list, list) { > + if (!info->enabled) > + continue; > + > + if (!is_memblk_offline(info->start_addr, info->length)) { > + result = offline_memory(info->start_addr, info->length); > + if (result) > + return result; > + } > + if (node < 0) > + node = memory_add_physaddr_to_nid(info->start_addr); > + > + result = remove_memory(node, info->start_addr, info->length); > + if (result) > + return result; > + > + list_del(&info->list); > + kfree(info); > + } > + > kfree(mem_device); > > return 0; > Index: linux-3.5-rc6/include/linux/memory_hotplug.h > =================================================================== > --- linux-3.5-rc6.orig/include/linux/memory_hotplug.h 2012-07-17 11:20:15.133796772 +0900 > +++ linux-3.5-rc6/include/linux/memory_hotplug.h 2012-07-17 11:29:41.490716352 +0900 > @@ -221,6 +221,7 @@ static inline void unlock_memory_hotplug > #ifdef CONFIG_MEMORY_HOTREMOVE > > extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); > +extern int remove_memory(int nid, u64 start, u64 size); > > #else > static inline int is_mem_section_removable(unsigned long pfn, > @@ -228,6 +229,10 @@ static inline int is_mem_section_removab > { > return 0; > } > +static inline int remove_memory(int nid, u64 start, u64 size) > +{ > + return -EBUSY; > +} > #endif /* CONFIG_MEMORY_HOTREMOVE */ > > extern int mem_online_node(int nid); > Index: linux-3.5-rc6/mm/memory_hotplug.c > =================================================================== > --- linux-3.5-rc6.orig/mm/memory_hotplug.c 2012-07-17 11:20:15.129796821 +0900 > +++ linux-3.5-rc6/mm/memory_hotplug.c 2012-07-17 13:25:18.952986069 +0900 > @@ -998,6 +998,28 @@ int offline_memory(u64 start, u64 size) > end_pfn = start_pfn + PFN_DOWN(size); > return offline_pages(start_pfn, end_pfn, 120 * HZ); > } > + > +int remove_memory(int nid, u64 start, u64 size) > +{ > + int ret = -EBUSY; > + lock_memory_hotplug(); > + /* > + * The memory might become online by other task, even if you offine it. > + * So we check whether the cpu has been onlined or not. > + */ > + if (!is_memblk_offline(start, size)) { > + pr_warn("memory removing [mem %#010llx-%#010llx] failed, " > + "because the memmory range is online\n", > + start, start + size); > + ret = -EAGAIN; > + } > + > + unlock_memory_hotplug(); > + return ret; > + > +} > +EXPORT_SYMBOL_GPL(remove_memory); > + > #else > int offline_memory(u64 start, u64 size) > { > Index: linux-3.5-rc6/drivers/base/memory.c > =================================================================== > --- linux-3.5-rc6.orig/drivers/base/memory.c 2012-07-17 11:20:15.120796934 +0900 > +++ linux-3.5-rc6/drivers/base/memory.c 2012-07-17 11:20:54.626302995 +0900 > @@ -70,6 +70,45 @@ void unregister_memory_isolate_notifier( > } > EXPORT_SYMBOL(unregister_memory_isolate_notifier); > > +bool is_memblk_offline(unsigned long start, unsigned long size) > +{ > + struct memory_block *mem = NULL; > + struct mem_section *section; > + unsigned long start_pfn, end_pfn; > + unsigned long pfn, section_nr; > + > + start_pfn = PFN_DOWN(start); > + end_pfn = start_pfn + PFN_DOWN(start); This line is wrong. I think you want this: end_pfn = start_pfn + PFN_UP(size); > + > + for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { > + section_nr = pfn_to_section_nr(pfn); > + if (!present_section_nr(section_nr)); The ';' should be removed. Otherwise, this function always return true... Thanks Wen Congyang > + continue; > + > + section = __nr_to_section(section_nr); > + /* same memblock? */ > + if (mem) > + if((section_nr >= mem->start_section_nr) && > + (section_nr <= mem->end_section_nr)) > + continue; > + > + mem = find_memory_block_hinted(section, mem); > + if (!mem) > + continue; > + if (mem->state == MEM_OFFLINE) > + continue; > + > + kobject_put(&mem->dev.kobj); > + return false; > + } > + > + if (mem) > + kobject_put(&mem->dev.kobj); > + > + return true; > +} > +EXPORT_SYMBOL(is_memblk_offline); > + > /* > * register_memory - Setup a sysfs device for a memory block > */ > Index: linux-3.5-rc6/include/linux/memory.h > =================================================================== > --- linux-3.5-rc6.orig/include/linux/memory.h 2012-07-17 11:18:00.693477455 +0900 > +++ linux-3.5-rc6/include/linux/memory.h 2012-07-17 11:20:54.632302919 +0900 > @@ -106,6 +106,10 @@ static inline int memory_isolate_notify( > { > return 0; > } > +static inline bool is_memblk_offline(unsigned long start, unsigned long size) > +{ > + return false; > +} > #else > extern int register_memory_notifier(struct notifier_block *nb); > extern void unregister_memory_notifier(struct notifier_block *nb); > @@ -120,6 +124,7 @@ extern int memory_isolate_notify(unsigne > extern struct memory_block *find_memory_block_hinted(struct mem_section *, > struct memory_block *); > extern struct memory_block *find_memory_block(struct mem_section *); > +extern bool is_memblk_offline(unsigned long start, unsigned long size); > #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) > enum mem_add_context { BOOT, HOTPLUG }; > #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > >
Hi Wen, 2012/07/19 16:23, Wen Congyang wrote: > At 07/18/2012 06:06 PM, Yasuaki Ishimatsu Wrote: >> acpi_memory_device_remove() has been prepared to remove physical memory. >> But, the function only frees acpi_memory_device currentlry. >> >> The patch adds following functions into acpi_memory_device_remove(): >> - offline memory >> - remove physical memory. It only check whether memory is online or not. >> - free acpi_memory_device >> >> 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> >> CC: Wen Congyang <wency@cn.fujitsu.com> >> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> >> >> --- >> drivers/acpi/acpi_memhotplug.c | 27 ++++++++++++++++++++++++++- >> drivers/base/memory.c | 39 +++++++++++++++++++++++++++++++++++++++ >> include/linux/memory.h | 5 +++++ >> include/linux/memory_hotplug.h | 5 +++++ >> mm/memory_hotplug.c | 22 ++++++++++++++++++++++ >> 5 files changed, 97 insertions(+), 1 deletion(-) >> >> Index: linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c >> =================================================================== >> --- linux-3.5-rc6.orig/drivers/acpi/acpi_memhotplug.c 2012-07-17 11:20:15.117796971 +0900 >> +++ linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c 2012-07-17 13:36:30.325594022 +0900 >> @@ -29,6 +29,7 @@ >> #include <linux/module.h> >> #include <linux/init.h> >> #include <linux/types.h> >> +#include <linux/memory.h> >> #include <linux/memory_hotplug.h> >> #include <linux/slab.h> >> #include <acpi/acpi_drivers.h> >> @@ -452,12 +453,36 @@ static int acpi_memory_device_add(struct >> static int acpi_memory_device_remove(struct acpi_device *device, int type) >> { >> struct acpi_memory_device *mem_device = NULL; >> - >> + struct acpi_memory_info *info, *tmp; >> + int result; >> + int node; >> >> if (!device || !acpi_driver_data(device)) >> return -EINVAL; >> >> mem_device = acpi_driver_data(device); >> + >> + node = acpi_get_node(mem_device->device->handle); >> + list_for_each_entry_safe(info, tmp, &mem_device->res_list, list) { >> + if (!info->enabled) >> + continue; >> + >> + if (!is_memblk_offline(info->start_addr, info->length)) { >> + result = offline_memory(info->start_addr, info->length); >> + if (result) >> + return result; >> + } >> + if (node < 0) >> + node = memory_add_physaddr_to_nid(info->start_addr); >> + >> + result = remove_memory(node, info->start_addr, info->length); >> + if (result) >> + return result; >> + >> + list_del(&info->list); >> + kfree(info); >> + } >> + >> kfree(mem_device); >> >> return 0; >> Index: linux-3.5-rc6/include/linux/memory_hotplug.h >> =================================================================== >> --- linux-3.5-rc6.orig/include/linux/memory_hotplug.h 2012-07-17 11:20:15.133796772 +0900 >> +++ linux-3.5-rc6/include/linux/memory_hotplug.h 2012-07-17 11:29:41.490716352 +0900 >> @@ -221,6 +221,7 @@ static inline void unlock_memory_hotplug >> #ifdef CONFIG_MEMORY_HOTREMOVE >> >> extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); >> +extern int remove_memory(int nid, u64 start, u64 size); >> >> #else >> static inline int is_mem_section_removable(unsigned long pfn, >> @@ -228,6 +229,10 @@ static inline int is_mem_section_removab >> { >> return 0; >> } >> +static inline int remove_memory(int nid, u64 start, u64 size) >> +{ >> + return -EBUSY; >> +} >> #endif /* CONFIG_MEMORY_HOTREMOVE */ >> >> extern int mem_online_node(int nid); >> Index: linux-3.5-rc6/mm/memory_hotplug.c >> =================================================================== >> --- linux-3.5-rc6.orig/mm/memory_hotplug.c 2012-07-17 11:20:15.129796821 +0900 >> +++ linux-3.5-rc6/mm/memory_hotplug.c 2012-07-17 13:25:18.952986069 +0900 >> @@ -998,6 +998,28 @@ int offline_memory(u64 start, u64 size) >> end_pfn = start_pfn + PFN_DOWN(size); >> return offline_pages(start_pfn, end_pfn, 120 * HZ); >> } >> + >> +int remove_memory(int nid, u64 start, u64 size) >> +{ >> + int ret = -EBUSY; >> + lock_memory_hotplug(); >> + /* >> + * The memory might become online by other task, even if you offine it. >> + * So we check whether the cpu has been onlined or not. >> + */ >> + if (!is_memblk_offline(start, size)) { >> + pr_warn("memory removing [mem %#010llx-%#010llx] failed, " >> + "because the memmory range is online\n", >> + start, start + size); >> + ret = -EAGAIN; >> + } >> + >> + unlock_memory_hotplug(); >> + return ret; >> + >> +} >> +EXPORT_SYMBOL_GPL(remove_memory); >> + >> #else >> int offline_memory(u64 start, u64 size) >> { >> Index: linux-3.5-rc6/drivers/base/memory.c >> =================================================================== >> --- linux-3.5-rc6.orig/drivers/base/memory.c 2012-07-17 11:20:15.120796934 +0900 >> +++ linux-3.5-rc6/drivers/base/memory.c 2012-07-17 11:20:54.626302995 +0900 >> @@ -70,6 +70,45 @@ void unregister_memory_isolate_notifier( >> } >> EXPORT_SYMBOL(unregister_memory_isolate_notifier); >> >> +bool is_memblk_offline(unsigned long start, unsigned long size) >> +{ >> + struct memory_block *mem = NULL; >> + struct mem_section *section; >> + unsigned long start_pfn, end_pfn; >> + unsigned long pfn, section_nr; >> + >> + start_pfn = PFN_DOWN(start); >> + end_pfn = start_pfn + PFN_DOWN(start); > > This line is wrong. I think you want this: > end_pfn = start_pfn + PFN_UP(size); Yes. I'll update it. >> + >> + for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { >> + section_nr = pfn_to_section_nr(pfn); >> + if (!present_section_nr(section_nr)); > > The ';' should be removed. Otherwise, this function always return true... Thanks. I'll update it. Thanks, Yasuaki Ishimatsu > Thanks > Wen Congyang > >> + continue; >> + >> + section = __nr_to_section(section_nr); >> + /* same memblock? */ >> + if (mem) >> + if((section_nr >= mem->start_section_nr) && >> + (section_nr <= mem->end_section_nr)) >> + continue; >> + >> + mem = find_memory_block_hinted(section, mem); >> + if (!mem) >> + continue; >> + if (mem->state == MEM_OFFLINE) >> + continue; >> + >> + kobject_put(&mem->dev.kobj); >> + return false; >> + } >> + >> + if (mem) >> + kobject_put(&mem->dev.kobj); >> + >> + return true; >> +} >> +EXPORT_SYMBOL(is_memblk_offline); >> + >> /* >> * register_memory - Setup a sysfs device for a memory block >> */ >> Index: linux-3.5-rc6/include/linux/memory.h >> =================================================================== >> --- linux-3.5-rc6.orig/include/linux/memory.h 2012-07-17 11:18:00.693477455 +0900 >> +++ linux-3.5-rc6/include/linux/memory.h 2012-07-17 11:20:54.632302919 +0900 >> @@ -106,6 +106,10 @@ static inline int memory_isolate_notify( >> { >> return 0; >> } >> +static inline bool is_memblk_offline(unsigned long start, unsigned long size) >> +{ >> + return false; >> +} >> #else >> extern int register_memory_notifier(struct notifier_block *nb); >> extern void unregister_memory_notifier(struct notifier_block *nb); >> @@ -120,6 +124,7 @@ extern int memory_isolate_notify(unsigne >> extern struct memory_block *find_memory_block_hinted(struct mem_section *, >> struct memory_block *); >> extern struct memory_block *find_memory_block(struct mem_section *); >> +extern bool is_memblk_offline(unsigned long start, unsigned long size); >> #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) >> enum mem_add_context { BOOT, HOTPLUG }; >> #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ >> >> > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a> >
Index: linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c =================================================================== --- linux-3.5-rc6.orig/drivers/acpi/acpi_memhotplug.c 2012-07-17 11:20:15.117796971 +0900 +++ linux-3.5-rc6/drivers/acpi/acpi_memhotplug.c 2012-07-17 13:36:30.325594022 +0900 @@ -29,6 +29,7 @@ #include <linux/module.h> #include <linux/init.h> #include <linux/types.h> +#include <linux/memory.h> #include <linux/memory_hotplug.h> #include <linux/slab.h> #include <acpi/acpi_drivers.h> @@ -452,12 +453,36 @@ static int acpi_memory_device_add(struct static int acpi_memory_device_remove(struct acpi_device *device, int type) { struct acpi_memory_device *mem_device = NULL; - + struct acpi_memory_info *info, *tmp; + int result; + int node; if (!device || !acpi_driver_data(device)) return -EINVAL; mem_device = acpi_driver_data(device); + + node = acpi_get_node(mem_device->device->handle); + list_for_each_entry_safe(info, tmp, &mem_device->res_list, list) { + if (!info->enabled) + continue; + + if (!is_memblk_offline(info->start_addr, info->length)) { + result = offline_memory(info->start_addr, info->length); + if (result) + return result; + } + if (node < 0) + node = memory_add_physaddr_to_nid(info->start_addr); + + result = remove_memory(node, info->start_addr, info->length); + if (result) + return result; + + list_del(&info->list); + kfree(info); + } + kfree(mem_device); return 0; Index: linux-3.5-rc6/include/linux/memory_hotplug.h =================================================================== --- linux-3.5-rc6.orig/include/linux/memory_hotplug.h 2012-07-17 11:20:15.133796772 +0900 +++ linux-3.5-rc6/include/linux/memory_hotplug.h 2012-07-17 11:29:41.490716352 +0900 @@ -221,6 +221,7 @@ static inline void unlock_memory_hotplug #ifdef CONFIG_MEMORY_HOTREMOVE extern int is_mem_section_removable(unsigned long pfn, unsigned long nr_pages); +extern int remove_memory(int nid, u64 start, u64 size); #else static inline int is_mem_section_removable(unsigned long pfn, @@ -228,6 +229,10 @@ static inline int is_mem_section_removab { return 0; } +static inline int remove_memory(int nid, u64 start, u64 size) +{ + return -EBUSY; +} #endif /* CONFIG_MEMORY_HOTREMOVE */ extern int mem_online_node(int nid); Index: linux-3.5-rc6/mm/memory_hotplug.c =================================================================== --- linux-3.5-rc6.orig/mm/memory_hotplug.c 2012-07-17 11:20:15.129796821 +0900 +++ linux-3.5-rc6/mm/memory_hotplug.c 2012-07-17 13:25:18.952986069 +0900 @@ -998,6 +998,28 @@ int offline_memory(u64 start, u64 size) end_pfn = start_pfn + PFN_DOWN(size); return offline_pages(start_pfn, end_pfn, 120 * HZ); } + +int remove_memory(int nid, u64 start, u64 size) +{ + int ret = -EBUSY; + lock_memory_hotplug(); + /* + * The memory might become online by other task, even if you offine it. + * So we check whether the cpu has been onlined or not. + */ + if (!is_memblk_offline(start, size)) { + pr_warn("memory removing [mem %#010llx-%#010llx] failed, " + "because the memmory range is online\n", + start, start + size); + ret = -EAGAIN; + } + + unlock_memory_hotplug(); + return ret; + +} +EXPORT_SYMBOL_GPL(remove_memory); + #else int offline_memory(u64 start, u64 size) { Index: linux-3.5-rc6/drivers/base/memory.c =================================================================== --- linux-3.5-rc6.orig/drivers/base/memory.c 2012-07-17 11:20:15.120796934 +0900 +++ linux-3.5-rc6/drivers/base/memory.c 2012-07-17 11:20:54.626302995 +0900 @@ -70,6 +70,45 @@ void unregister_memory_isolate_notifier( } EXPORT_SYMBOL(unregister_memory_isolate_notifier); +bool is_memblk_offline(unsigned long start, unsigned long size) +{ + struct memory_block *mem = NULL; + struct mem_section *section; + unsigned long start_pfn, end_pfn; + unsigned long pfn, section_nr; + + start_pfn = PFN_DOWN(start); + end_pfn = start_pfn + PFN_DOWN(start); + + for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) { + section_nr = pfn_to_section_nr(pfn); + if (!present_section_nr(section_nr)); + continue; + + section = __nr_to_section(section_nr); + /* same memblock? */ + if (mem) + if((section_nr >= mem->start_section_nr) && + (section_nr <= mem->end_section_nr)) + continue; + + mem = find_memory_block_hinted(section, mem); + if (!mem) + continue; + if (mem->state == MEM_OFFLINE) + continue; + + kobject_put(&mem->dev.kobj); + return false; + } + + if (mem) + kobject_put(&mem->dev.kobj); + + return true; +} +EXPORT_SYMBOL(is_memblk_offline); + /* * register_memory - Setup a sysfs device for a memory block */ Index: linux-3.5-rc6/include/linux/memory.h =================================================================== --- linux-3.5-rc6.orig/include/linux/memory.h 2012-07-17 11:18:00.693477455 +0900 +++ linux-3.5-rc6/include/linux/memory.h 2012-07-17 11:20:54.632302919 +0900 @@ -106,6 +106,10 @@ static inline int memory_isolate_notify( { return 0; } +static inline bool is_memblk_offline(unsigned long start, unsigned long size) +{ + return false; +} #else extern int register_memory_notifier(struct notifier_block *nb); extern void unregister_memory_notifier(struct notifier_block *nb); @@ -120,6 +124,7 @@ extern int memory_isolate_notify(unsigne extern struct memory_block *find_memory_block_hinted(struct mem_section *, struct memory_block *); extern struct memory_block *find_memory_block(struct mem_section *); +extern bool is_memblk_offline(unsigned long start, unsigned long size); #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) enum mem_add_context { BOOT, HOTPLUG }; #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */
acpi_memory_device_remove() has been prepared to remove physical memory. But, the function only frees acpi_memory_device currentlry. The patch adds following functions into acpi_memory_device_remove(): - offline memory - remove physical memory. It only check whether memory is online or not. - free acpi_memory_device 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> CC: Wen Congyang <wency@cn.fujitsu.com> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> --- drivers/acpi/acpi_memhotplug.c | 27 ++++++++++++++++++++++++++- drivers/base/memory.c | 39 +++++++++++++++++++++++++++++++++++++++ include/linux/memory.h | 5 +++++ include/linux/memory_hotplug.h | 5 +++++ mm/memory_hotplug.c | 22 ++++++++++++++++++++++ 5 files changed, 97 insertions(+), 1 deletion(-)