Re: [RFC PATCH] mm, memory_hotplug: support movable_node for hotplugable nodes

[Reza Arbab]

On Thu, Jun 01, 2017 at 06:14:54PM +0200, Michal Hocko wrote:
> On Thu 01-06-17 11:02:28, Reza Arbab wrote:
> > On Thu, Jun 01, 2017 at 02:20:04PM +0200, Michal Hocko wrote:
> > >Teach move_pfn_range that MMOP_ONLINE_KEEP can use the movable zone if
> > >movable_node is enabled and the range doesn't overlap with the existing
> > >normal zone. This should provide a reasonable default onlining strategy.
> >
> > I like it. If your distro has some auto-onlining udev rule like
> >
> > SUBSYSTEM=="memory", ACTION=="add", ATTR{state}=="offline", ATTR{state}="online"
> >
> > You could get things onlined as movable just by putting movable_node in
> > the boot params, without changing/modifying the rule.
>
> yes this is the primary point of the patch ;)

Ha. What can I say, I like restating the obvious!

At some point after all these cleanups/improvements, it would be worth 
making sure Documentation/memory-hotplug.txt is still accurate.

--
Reza Arbab