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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2008-08-01 16:39:16 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-08-01 16:39:33 +0200
commit7e9238fbc10373effc2c3b0b516b0bdc8fefc27b (patch)
treeba4fb9266e73e35037a4f79ad68d51be4e5f463d /arch/s390
parent519620cc3d723d41522191ebd150fba4a3790296 (diff)
downloadop-kernel-dev-7e9238fbc10373effc2c3b0b516b0bdc8fefc27b.zip
op-kernel-dev-7e9238fbc10373effc2c3b0b516b0bdc8fefc27b.tar.gz
[S390] Add support for memory hot-remove.
This patch enables memory hot-remove on s390. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig3
-rw-r--r--arch/s390/mm/init.c13
2 files changed, 15 insertions, 1 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 2ed8812..8d41908 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -317,6 +317,9 @@ config ARCH_ENABLE_MEMORY_HOTPLUG
def_bool y
depends on SPARSEMEM
+config ARCH_ENABLE_MEMORY_HOTREMOVE
+ def_bool y
+
source "mm/Kconfig"
comment "I/O subsystem configuration"
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 4993b0f..1169130 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -179,7 +179,7 @@ int arch_add_memory(int nid, u64 start, u64 size)
int rc;
pgdat = NODE_DATA(nid);
- zone = pgdat->node_zones + ZONE_NORMAL;
+ zone = pgdat->node_zones + ZONE_MOVABLE;
rc = vmem_add_mapping(start, size);
if (rc)
return rc;
@@ -189,3 +189,14 @@ int arch_add_memory(int nid, u64 start, u64 size)
return rc;
}
#endif /* CONFIG_MEMORY_HOTPLUG */
+
+#ifdef CONFIG_MEMORY_HOTREMOVE
+int remove_memory(u64 start, u64 size)
+{
+ unsigned long start_pfn, end_pfn;
+
+ start_pfn = PFN_DOWN(start);
+ end_pfn = start_pfn + PFN_DOWN(size);
+ return offline_pages(start_pfn, end_pfn, 120 * HZ);
+}
+#endif /* CONFIG_MEMORY_HOTREMOVE */
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