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.
