Re: [rfc] mm, hugetlb: allow hugepage allocations to excessively reclaim

[David Rientjes]

On Fri, 4 Oct 2019, Michal Hocko wrote:

> Requesting the userspace to drop _all_ page cache in order allocate a
> number of hugetlb pages or any other affected __GFP_RETRY_MAYFAIL
> requests is simply not reasonable IMHO.

It can be used as a fallback when writing to nr_hugepages and the amount 
allocated did not match expectation.  Again, I'll defer all of this to 
Mike when he returns: he expressed his preference, I suggested an 
alternative to consider, and he can make the decision to ack or nack this 
patch because he has a better understanding of that expectation from users 
who use hugetlb pages.