Re: [PATCH v2] memory-hotplug: add sysfs zones_online_to attribute

[David Rientjes <rientjes@google.com>]

On Wed, 13 Aug 2014, Zhang Zhen wrote:

> Currently memory-hotplug has two limits:
> 1. If the memory block is in ZONE_NORMAL, you can change it to
> ZONE_MOVABLE, but this memory block must be adjacent to ZONE_MOVABLE.
> 2. If the memory block is in ZONE_MOVABLE, you can change it to
> ZONE_NORMAL, but this memory block must be adjacent to ZONE_NORMAL.
> 
> With this patch, we can easy to know a memory block can be onlined to
> which zone, and don't need to know the above two limits.
> 
> Updated the related Documentation.
> 
> Change v1 -> v2:
> - optimize the implementation following Dave Hansen's suggestion
> 
> Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>

linux-next build failure:

drivers/built-in.o: In function `show_zones_online_to':
memory.c:(.text+0x13ee09): undefined reference to `test_pages_in_a_zone'

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