Subject: Re: [RFC PATCH v5 12/19] memory-hotplug: introduce new function arch_remove_memory()

From: Wen Congyang <[email-masked]>
Date: Mon, 30 Jul 2012 18:35:37 +0800

At 07/30/2012 06:23 PM, Heiko Carstens Wrote:
> On Fri, Jul 27, 2012 at 06:32:15PM +0800, Wen Congyang wrote:
>> We don't call __add_pages() directly in the function add_memory()
>> because some other architecture related things need to be done
>> before or after calling __add_pages(). So we should introduce
>> a new function arch_remove_memory() to revert the things
>> done in arch_add_memory().
>>
>> Note: the function for s390 is not implemented(I don't know how to
>> implement it for s390).
> 
> There is no hardware or firmware interface which could trigger a
> hot memory remove on s390. So there is nothing that needs to be
> implemented.

Thanks for providing this information.

According to this, arch_remove_memory() for s390 can just return -EBUSY.

Thanks
Wen Congyang

> 
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