Re: hugetlb page migration vs. overcommit

[Michal Hocko]

On Wed 22-11-17 11:11:38, Mike Kravetz wrote:
> On 11/22/2017 07:28 AM, Michal Hocko wrote:
[...]
> > Why don't we simply migrate as long as we are able to allocate the
> > target hugetlb page? I have a half baked patch to remove this
> > restriction, would there be an opposition to do something like that?
> 
> I would not be opposed and would help with this effort.  My concern would
> be any subtle hugetlb accounting issues once you start messing with
> additional overcommit pages.

Well my current (crude) patch checks for overcommit in the destructor
and releases the page if we are over. That should deal with accounting
AFAICS.
-- 
Michal Hocko
SUSE Labs