Re: [PATCH] mm, trivial: Simplify swap related code in try_to_unmap_one()

[Michal Hocko]

On Wed 01-04-20 09:11:13, Huang, Ying wrote:
[...]
> Then what is the check !PageSwapBacked() && PageSwapCache() for?  To
> prevent someone to change the definition of PageSwapCache() in the
> future to break this?

Yes this is my understading. It is essentially an assert that enforces
the assumption about swap cache vs. swap backed being coupled.
-- 
Michal Hocko
SUSE Labs