Re: [PATCH -v2 0/9] mm: make movable onlining suck less

[Michal Hocko]

On Tue 11-04-17 10:01:52, Igor Mammedov wrote:
> On Mon, 10 Apr 2017 16:56:39 +0200
> Michal Hocko <mhocko@xxxxxxxxxx> wrote:
[...]
> > > #echo online_kernel > memory32/state
> > > write error: Invalid argument
> > > // that's not what's expected  
> > 
> > this is proper behavior with the current implementation. Does anything
> > depend on the zone reusing?
> if we didn't have zone imbalance issue in design,
> the it wouldn't matter but as it stands it's not
> minore issue.
> 
> Consider following,
> one hotplugs some memory and onlines it as movable,
> then one needs to hotplug some more but to do so 
> one one needs more memory from zone NORMAL and to keep
> zone balance some memory in MOVABLE should be reonlined
> as NORMAL

Is this something that we absolutely have to have right _now_? Or are you
OK if I address this in follow up series? Because it will make the
current code slightly more complex and to be honest I would rather like
to see this "core" merge and build more on top.
-- 
Michal Hocko
SUSE Labs