On Fri, Dec 20, 2019 at 08:22:02AM -0800, Eric Dumazet wrote: > I definitely seen expensive per-cpu updates in the stack. > (SNMP counters, or per-cpu stats for packets/bytes counters) > > It might be nice to have an option to use 2M pages. > > (I recall sending some patches in the past about using high-order pages for vmalloc, > but this went nowhere) Yeah, the percpu allocator implementation is half-way prepared for that. There just hasn't been a real need for that yet. If this actually is a difference coming from tlb pressure, this might be it, I guess? Thanks. -- tejun
