On Fri, 27 Feb 2026 10:37:27 -0500 Mathieu Desnoyers <[email protected]> wrote:
> This series introduces the hierarchical tree counter (hpcc) to increase > accuracy of approximated RSS counters exposed through proc interfaces. > > With a test program hopping across CPUs doing frequent mmap/munmap > operations, the upstream implementation approximation reaches a 1GB > delta from the precise value after a few minutes, compared to a 80MB > delta with the hierarchical counter. The hierarchical counter provides a > guaranteed maximum approximation inaccuracy of 192MB on that hardware > topology. > > This series is based on tag v7.0-rc1. > > The main changes since v17: > - Fix patch series bissectability. > - Export GPL symbols for kunit tests. > - Improve kunit tests coverage. > - Fix kunit tests wait queue head reinit bug. > - Fix an out-of-bound on bootup on configurations where nr_cpu_ids is > close to NR_CPUS. Updated, thanks. > Andrew, this series targets 7.1. Some review would be useful. Can you think of someone we could ask to undertake this?
