On 08/04/2015 04:26 PM, gongzhaogang@inspur.com wrote:

Sorry,I am new.

quoted

But,
1) in cpu_up(), it will try to online a node, and it doesn't check if
the node has memory.
2) in try_offline_node(), it offlines CPUs first, and then the memory.
This behavior looks a little wired, or let's say it is ambiguous. It
seems that a NUMA node
consists of CPUs and memory. So if the CPUs are online, the node should
be online.

I suggested you to try the patch offered by Liu Jiang.

https://lkml.org/lkml/2014/9/11/1087

Well, I think Liu Jiang meant this patch set. :)

https://lkml.org/lkml/2014/7/11/75

I have tried ,It is OK.

quoted

Unfortunately, since I don't have a machine a with memory-less node, I
cannot reproduce
the problem right now.

If  not hurried  , I can test your patches in our environment on weekends.

Thanks. But this version of my patch set is obviously problematic.
It will be very nice of you if you can help to test the next version.
But maybe in a few days.

Thanks. :)