When acpi_memory_device_init() is called at boottime to register struct memory acpi_memory_device, acpi_bus_add() are called via acpi_driver_attach(). But it also calls ops->start() function. It is called even if the memory blocks are initialized at early boottime. In this case add_memory() return -EEXIST, and the memory blocks becomes INVALID state even if it is normal. This is patch to avoid calling add_memory() for already available memory. Signed-off-by: Yasunori Goto <y-goto@xxxxxxxxxxxxxx> drivers/acpi/acpi_memhotplug.c | 10 ++++++++++ 1 files changed, 10 insertions(+) Index: pgdat8/drivers/acpi/acpi_memhotplug.c =================================================================== --- pgdat8.orig/drivers/acpi/acpi_memhotplug.c 2006-03-16 16:06:27.000000000 +0900 +++ pgdat8/drivers/acpi/acpi_memhotplug.c 2006-03-16 16:41:36.000000000 +0900 @@ -234,6 +234,16 @@ static int acpi_memory_enable_device(str * (i.e. memory-hot-remove function) */ list_for_each_entry(info, &mem_device->res_list, list) { + u64 start_pfn, end_pfn; + start_pfn= info->start_addr >> PAGE_SHIFT; + end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT; + + if (pfn_valid(start_pfn) || pfn_valid(end_pfn)){ + /* already enabled. try next area */ + num_enabled++; + continue; + } + result = add_memory(info->start_addr, info->length); if (result) continue; -- Yasunori Goto - : send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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