The patch titled
register hot-added memory to iomem resource
has been added to the -mm tree. Its filename is
register-hot-added-memory-to-iomem-resource.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Register hot-added memory to iomem_resource. With this, /proc/iomem can
show hot-added memory.
Note: kdump uses /proc/iomem to catch memory range when it is installed.
So, kdump should be re-installed after /proc/iomem change.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/memory_hotplug.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+)
diff -puN mm/memory_hotplug.c~register-hot-added-memory-to-iomem-resource mm/memory_hotplug.c
--- 25/mm/memory_hotplug.c~register-hot-added-memory-to-iomem-resource Thu Apr 27 16:02:20 2006
+++ 25-akpm/mm/memory_hotplug.c Thu Apr 27 16:02:20 2006
@@ -21,6 +21,7 @@
#include <linux/memory_hotplug.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
+#include <linux/ioport.h>
#include <asm/tlbflush.h>
@@ -188,6 +189,27 @@ static void rollback_node_hotadd(int nid
return;
}
+/* add this memory to iomem resource */
+static void register_memory_resource(u64 start, u64 size)
+{
+ struct resource *res;
+
+ res = kzalloc(sizeof(struct resource), GFP_KERNEL);
+ BUG_ON(!res);
+
+ res->name = "System RAM";
+ res->start = start;
+ res->end = start + size - 1;
+ res->flags = IORESOURCE_MEM;
+ if (request_resource(&iomem_resource, res) < 0) {
+ printk("System RAM resource %llx - %llx cannot be added\n",
+ (unsigned long long)res->start, (unsigned long long)res->end);
+ kfree(res);
+ }
+}
+
+
+
int add_memory(int nid, u64 start, u64 size)
{
pg_data_t *pgdat = NULL;
@@ -213,6 +235,9 @@ int add_memory(int nid, u64 start, u64 s
/* we online node here. we have no error path from here. */
node_set_online(nid);
+ /* register this memory as resource */
+ register_memory_resource(start, size);
+
return ret;
error:
/* rollback pgdat allocation and others */
_
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
acpi-memory-hotplug-cannot-manage-_crs-with-plural-resoureces.patch
for_each_possible_cpu-under-drivers-acpi.patch
ia64-acpi_memhotplug-fix.patch
for_each_possible_cpu-mips.patch
x86_64-mm-hotadd-reserve-fix-fix-fix.patch
for_each_possible_cpu-xfs.patch
wait_table-and-zonelist-initializing-for-memory-hotaddadd-return-code-for-init_current_empty_zone.patch
wait_table-and-zonelist-initializing-for-memory-hotadd-wait_table-initialization.patch
wait_table-and-zonelist-initializing-for-memory-hotadd-wait_table-initialization-fixes.patch
wait_table-and-zonelist-initializing-for-memory-hotadd-update-zonelists.patch
support-for-panic-at-oom.patch
preserve-write-permissions-in-migration-entries.patch
read-write-migration-entries-implement-correct-behavior-in-copy_one_pte.patch
pgdat-allocation-for-new-node-add-generic-alloc-node_data.patch
pgdat-allocation-for-new-node-add-generic-alloc-node_data-tidy.patch
pgdat-allocation-for-new-node-add-refresh-node_data.patch
pgdat-allocation-for-new-node-add-refresh-node_data-fix.patch
pgdat-allocation-for-new-node-add-export-kswapd-start-func.patch
pgdat-allocation-for-new-node-add-export-kswapd-start-func-tidy.patch
pgdat-allocation-for-new-node-add-call-pgdat-allocation.patch
register-hot-added-memory-to-iomem-resource.patch
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