Re: [PATCH] mm: don't rely on system state to detect hot-plug operations

[Michal Hocko]

On Wed 09-09-20 18:07:15, Laurent Dufour wrote:
> Le 09/09/2020 à 12:59, Michal Hocko a écrit :
> > On Wed 09-09-20 11:21:58, Laurent Dufour wrote:
[...]
> > > For the point a, using the enum allows to know in
> > > register_mem_sect_under_node() if the link operation is due to a hotplug
> > > operation or done at boot time.
> > 
> > Yes, but let me repeat. We have a mess here and different paths check
> > for the very same condition by different ways. We need to unify those.
> 
> What are you suggesting to unify these checks (using a MP_* enum as
> suggested by David, something else)?

We do have system_state check spread at different places. I would use
this one and wrap it behind a helper. Or have I missed any reason why
that wouldn't work for this case?

-- 
Michal Hocko
SUSE Labs