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SubjectRe: [PATCH] mm/page_alloc: Deprecate kernelcore=nn and movable_core=
On Tue 17-07-18 13:46:43, David Rientjes wrote:
> On Tue, 17 Jul 2018, Baoquan He wrote:
>
> > We can still use 'kernelcore=mirror' or 'movable_node' for the usage
> > of hotplug and movable zone. If somebody shows up with a valid usecase
> > we can reconsider.
> >
>
> We actively use kernelcore=n%, I had recently added support for the option
> in the first place in 4.17. It's certainly not deprecated.
>
> commit a5c6d6509342785bef53bf9508e1842b303f1878
> Author: David Rientjes <rientjes@google.com>
> Date: Thu Apr 5 16:23:09 2018 -0700
>
> mm, page_alloc: extend kernelcore and movablecore for percent

What kind of functionality do you need to not depend on this knob?
I mean it is a gross hack and you are basically working around
fragmentation issues. ZONE_MOVABLE doesn't seem to be a long term
solution here IMHO.
--
Michal Hocko
SUSE Labs

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