Re: [PATCH v2] mm: hugetlb: optionally allocate gigantic hugepages using cma

[Michal Hocko]

On Tue 10-03-20 12:19:06, Roman Gushchin wrote:
[...]
> > I found this out by testing code and specifying hugetlb_cma=2M.  Messages
> > in log were:
> > 	kernel: hugetlb_cma: reserve 2097152, 1048576 per node
> > 	kernel: hugetlb_cma: successfully reserved 1048576 on node 0
> > 	kernel: hugetlb_cma: successfully reserved 1048576 on node 1
> > But, it really reserved 1GB per node.
> 
> Good point! In the passed size is too small to cover a single huge page,
> we should probably print a warning and bail out.

Or maybe you just want to make the interface the unit size rather than
overall size oriented. E.g. I want 10G pages per each numa node.
-- 
Michal Hocko
SUSE Labs