Re: [PATCH 0/3] memory-hotplug: improve rezoning capability

[Andrew Morton]

On Mon,  9 May 2016 12:53:36 -0500 Reza Arbab <arbab@xxxxxxxxxxxxxxxxxx> wrote:

> While it is currently possible to rezone memory when it is onlined, there are
> implicit assumptions about the zones:
> 
> * To "online_kernel" a block into ZONE_NORMAL, it must currently
>   be in ZONE_MOVABLE.
> 
> * To "online_movable" a block into ZONE_MOVABLE, it must currently
>   be in (ZONE_MOVABLE - 1).
> 
> So on powerpc, where new memory is hotplugged into ZONE_DMA, these operations
> do not work.
> 
> This patchset replaces the qualifications above with a more general
> validation of zone movement.
> 

The patches look good from a first scan.  It's late for 4.6 so I'll
queue them for 4.7-rc1, unless there are convincing reasons otherwise?

Hopefully the other memory-hotplug developers will be able to find time
to review these.