The patch titled
x86_64: add memory hotremove config option
has been removed from the -mm tree. Its filename was
x86_64-add-memory-hotremove-config-option.patch
This patch was dropped because it is obsolete
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: x86_64: add memory hotremove config option
From: Gary Hade <garyhade@xxxxxxxxxx>
Memory hotremove functionality can currently be configured into the ia64,
powerpc, and s390 kernels. This patch makes it possible to configure the
memory hotremove functionality into the x86_64 kernel as well.
Signed-off-by: Gary Hade <garyhade@xxxxxxxxxx>
Acked-by: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/x86/Kconfig | 3 +++
arch/x86/mm/init_64.c | 18 ++++++++++++++++++
2 files changed, 21 insertions(+)
diff -puN arch/x86/Kconfig~x86_64-add-memory-hotremove-config-option arch/x86/Kconfig
--- a/arch/x86/Kconfig~x86_64-add-memory-hotremove-config-option
+++ a/arch/x86/Kconfig
@@ -1528,6 +1528,9 @@ config ARCH_ENABLE_MEMORY_HOTPLUG
def_bool y
depends on X86_64 || (X86_32 && HIGHMEM)
+config ARCH_ENABLE_MEMORY_HOTREMOVE
+ def_bool y
+
config HAVE_ARCH_EARLY_PFN_TO_NID
def_bool X86_64
depends on NUMA
diff -puN arch/x86/mm/init_64.c~x86_64-add-memory-hotremove-config-option arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~x86_64-add-memory-hotremove-config-option
+++ a/arch/x86/mm/init_64.c
@@ -856,6 +856,24 @@ int memory_add_physaddr_to_nid(u64 start
EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
#endif
+#ifdef CONFIG_MEMORY_HOTREMOVE
+int remove_memory(u64 start, u64 size)
+{
+ unsigned long start_pfn, end_pfn;
+ unsigned long timeout = 120 * HZ;
+ int ret;
+ start_pfn = start >> PAGE_SHIFT;
+ end_pfn = start_pfn + (size >> PAGE_SHIFT);
+ ret = offline_pages(start_pfn, end_pfn, timeout);
+ if (ret)
+ goto out;
+ /* Arch-specific calls go here */
+out:
+ return ret;
+}
+EXPORT_SYMBOL_GPL(remove_memory);
+#endif /* CONFIG_MEMORY_HOTREMOVE */
+
#endif /* CONFIG_MEMORY_HOTPLUG */
/*
_
Patches currently in -mm which might be from garyhade@xxxxxxxxxx are
x86_64-add-memory-hotremove-config-option.patch
mm-cleanup-to-make-remove_memory-arch-neutral-fix-fix.patch
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