Re: [RFC v1 00/19] Modify zonelist to nodelist v1

Michal Hocko
2019-11-26T15:41:06Z

On Tue 26-11-19 10:30:56, Qian Cai wrote:
>
>
> > On Nov 25, 2019, at 3:39 AM, Michal Hocko <mhocko@kernel.org> wrote:
> >
> > People do care about ZONE_MOVABLE and if there is a non-movable memory
> > sitting there then it is a bug. Please report that.
>
> It is trivial to test yourself if you ever care. Just pass kernelcore=
> to as many NUMA machines you could find, an then test if ever possible
> to offline those memory.

I definitely do care if you can provide more details (ideally in a
separate email thread). I am using movable memory for memory hotplug
usecases and so far I do not remember any kernel/non-movable allocations
would make it in - modulo bugs when somebody might use __GFP_MOVABLE
when it is not appropriate.

--
Michal Hocko
SUSE Labs