[LTP] [PATCH] thp02: simplify test to lower memory requirements

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> Hi!
> > Test is using 4 hugepages per allocation, and makes 4*3 allocations
> > in total. This is problem for aarch64, where default huge page size
> > is 512M. Systems are running into unexpected OOMs, because there
> > is no check for available memory.
> > 
> > Simplify test by:
> > - dropping 3rd allocation, it's used only for pattern comparison
> > - run test function in new child process, so we don't need to worry
> >   about cleaning up after mremap() and it lowers overall memory
> >   requirements
> > - add a simple check if there's enough memory to setup()
> > - drop .needs_root, there's no need for it
> 
> Looks good, acked.

Pushed.