At 09/01/2012 04:55 AM, Andrew Morton Wrote:
> On Tue, 28 Aug 2012 18:00:11 +0800
> wency@xxxxxxxxxxxxxx wrote:
>
>> +int remove_memory(int nid, u64 start, u64 size)
>> +{
>> + int ret = -EBUSY;
>> + lock_memory_hotplug();
>> + /*
>> + * The memory might become online by other task, even if you offine it.
>> + * So we check whether the cpu has been onlined or not.
>
> I think you meant "memory", not "cpu".
Yes. I will fix it.
Thanks
Wen Congyang
>
> Actually, "check whether any part of this memory range has been
> onlined" would be better. If that is accurate ;)
>
>> + */
>> + if (!is_memblk_offline(start, size)) {
>> + pr_warn("memory removing [mem %#010llx-%#010llx] failed, "
>> + "because the memmory range is online\n",
>> + start, start + size);
>> + ret = -EAGAIN;
>> + }
>> +
>> + unlock_memory_hotplug();
>> + return ret;
>> +
>> +}
>> +EXPORT_SYMBOL_GPL(remove_memory);
>
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