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 EcSXlOPS zs97PoMFi1IsRIlkcq28LeizKC1QoaXZbu0HwLCIOwDx6VlMeSR8LCUuRNdwQap1YUZSr7FLd6kb/xiFjqbvk06upDg87C8QoHrJfHGYKNH++tCFs8IQ9LE2ZEMSpb+oxQkudguIPb3W12qviwBi5zsXiv6+Sd8aGTg+FzaPGRuQ38lJVEXPmYk8embUTJXNG54ZODRE0i0L+pr5vnaQ8q90M9GCFUHiqDy+momt7ciVAJ2jt0jmzMSjvFknAJw4gN6yMwdq/keGfqyYHKweMS87vfaBOzqQW0oJzWK7LZmyM19RtusU8gOMOG/UOo+6OCXUKkdkuAE6yvDroxx9GzjwtoPScpOA/7CaCMRaC5YMTpPa6SlGqE2DYf4BnluaQaWP+UAGrlZ/Hbj3b937hZbhBhg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 09/27/23 14:47, Johannes Weiner wrote: > On Wed, Sep 27, 2023 at 01:21:20PM +0200, Michal Hocko wrote: > > On Tue 26-09-23 12:49:47, Nhat Pham wrote: > > So that if you use 80% hugetlb, the other memory is forced to stay in > the remaining 20%, or it OOMs; and that if you don't use hugetlb, the > group is still allowed to use the full 100% of its host memory > allowance, without requiring some outside agent continuously > monitoring and adjusting the container limits. Jumping in late here as I was traveling last week. In addition, I want to state my limited cgroup knowledge up front. I was thinking of your scenario above a little differently. Suppose a group is up and running at almost 100% memory usage. However, the majority of that memory is reclaimable. Now, someone wants to allocate a 2M hugetlb page. There is not 2MB free, but we could easily reclaim 2MB to make room for the hugetlb page. I may be missing something, but I do not see how that is going to happen. It seems like we would really want that behavior. -- Mike Kravetz