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Re: [PATCH] mm: take memory hotplug lock within numa_zonelist_order_handler()

From Heiko Carstens <heiko.carstens@de.ibm.com>
Newsgroups linux.kernel
Subject Re: [PATCH] mm: take memory hotplug lock within numa_zonelist_order_handler()
Date 2017-07-26 13:50 +0200
Message-ID <u7sZc-8do-15@gated-at.bofh.it> (permalink)
References <u7sw9-83B-5@gated-at.bofh.it> <u7sPw-89V-7@gated-at.bofh.it>
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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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Thread

[PATCH] mm: take memory hotplug lock within numa_zonelist_order_handler() Heiko Carstens <heiko.carstens@de.ibm.com> - 2017-07-26 13:20 +0200
  Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Michal Hocko <mhocko@kernel.org> - 2017-07-26 13:40 +0200
    Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Heiko Carstens <heiko.carstens@de.ibm.com> - 2017-07-26 13:50 +0200
      Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Michal Hocko <mhocko@kernel.org> - 2017-07-26 14:20 +0200
        Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Andrew Morton <akpm@linux-foundation.org> - 2017-07-27 00:30 +0200
          Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Michal Hocko <mhocko@kernel.org> - 2017-07-27 09:00 +0200
  Re: [PATCH] mm: take memory hotplug lock within  numa_zonelist_order_handler() Thomas Gleixner <tglx@linutronix.de> - 2017-07-26 15:40 +0200

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