+per-cpu memory maintainers for FYI. Thread started at https://lore.kernel.org/linux-mm/202301301057.e55dad5b-oliver.sang@xxxxxxxxx/ On Mon, Jan 30, 2023 at 9:57 PM Shakeel Butt <shakeelb@xxxxxxxxxx> wrote: > [...] > > > > We could cut down the number of calls to pcpu_alloc() by a factor of 4 > > by having a pcpu_alloc_bulk() that would allocate all four RSS counters > > at once. > > > > Just throwing out ideas ... > > Thanks, I will take a stab at pcpu_alloc_bulk() and will share the > result tomorrow. > OK, not a one day effort. Andrew, which option do you prefer? 1. Keep the patches as the test workload (fork ping pong) is not a representative of real world workload and work on improving pcpu_alloc() for 6.4+. 2. Revert the patches for now, improve pcpu_alloc() and re-introduce the patches once we confirm that fork-ping-pong is not regressed anymore. thanks, Shakeel
