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

[Andrew Morton]

On Mon, 9 May 2016 13:11:58 -0700 Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote:

> 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?

err, make that 4.8-rc1.

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