diff options
| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2006-06-27 02:53:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-27 17:32:36 -0700 |
| commit | 0a54703904a4a206686b4e8c3f5a6927b60747aa (patch) | |
| tree | 2aa373cdd78094666d9cdf526391235a65afaee8 /mm/memory_hotplug.c | |
| parent | 9af3c2dea3a3ae4248d81a70b556adfe1dc65d55 (diff) | |
| download | lwn-0a54703904a4a206686b4e8c3f5a6927b60747aa.tar.gz lwn-0a54703904a4a206686b4e8c3f5a6927b60747aa.zip | |
[PATCH] register hot-added memory to iomem resource
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@jp.fujitsu.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 83d37a401b3b..0b11a8543441 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -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> @@ -192,6 +193,27 @@ static void rollback_node_hotadd(int nid, pg_data_t *pgdat) 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; @@ -217,6 +239,9 @@ int add_memory(int nid, u64 start, u64 size) /* 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 */ |