Occasional hung with UM after enable VMAP_STACK

[Johannes Berg]

On Tue, 2022-01-04 at 15:10 -0300, Walter Lozano wrote:
> Hi all,
> 
> I noticed that after "um: enable VMAP_STACK" [1] I experienced some 
> occasional hung in my Gitlab CI jobs that use user-mode-linux to build 
> distro images.
> 

Did you actually *enable* VMAP_STACK in the config as well? The commit
just makes it *possible* to enable it, you still have to set it
yourself. So you should be able to easily check with/without that
setting.

johannes