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SubjectRe: [PATCH] mm: take memory hotplug lock within numa_zonelist_order_handler()
On Wed, Jul 26, 2017 at 01:31:12PM +0200, Michal Hocko wrote:
> On Wed 26-07-17 13:17:38, Heiko Carstens wrote:
> [...]
> > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> > index 6d30e914afb6..fc32aa81f359 100644
> > --- a/mm/page_alloc.c
> > +++ b/mm/page_alloc.c
> > @@ -4891,9 +4891,11 @@ int numa_zonelist_order_handler(struct ctl_table *table, int write,
> > NUMA_ZONELIST_ORDER_LEN);
> > user_zonelist_order = oldval;
> > } else if (oldval != user_zonelist_order) {
> > + mem_hotplug_begin();
> > mutex_lock(&zonelists_mutex);
> > build_all_zonelists(NULL, NULL);
> > mutex_unlock(&zonelists_mutex);
> > + mem_hotplug_done();
> > }
> > }
> > out:
>
> Please note that this code has been removed by
> http://lkml.kernel.org/r/20170721143915.14161-2-mhocko@kernel.org. It
> will get to linux-next as soon as Andrew releases a new version mmotm
> tree.

We still would need something for 4.13, no?

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