On Fri, May 16, 2025, Rick P Edgecombe wrote: > On Fri, 2025-05-16 at 06:11 -0700, Vishal Annapurve wrote: > > Google internally uses 1G hugetlb pages to achieve high bandwidth IO, > > lower memory footprint using HVO and lower MMU/IOMMU page table memory > > footprint among other improvements. These percentages carry a > > substantial impact when working at the scale of large fleets of hosts > > each carrying significant memory capacity. > > There must have been a lot of measuring involved in that. But the numbers I was > hoping for were how much does *this* series help upstream. ... > I asked this question assuming there were some measurements for the 1GB part of > this series. It sounds like the reasoning is instead that this is how Google > does things, which is backed by way more benchmarking than kernel patches are > used to getting. So it can just be reasonable assumed to be helpful. > > But for upstream code, I'd expect there to be a bit more concrete than "we > believe" and "substantial impact". It seems like I'm in the minority here > though. So if no one else wants to pressure test the thinking in the usual way, > I guess I'll just have to wonder.
