From: Jesper Dangaard Brouer <bro...@redhat.com> Date: Fri, 01 Sep 2017 11:26:03 +0200
> There is a bug in fragmentation codes use of the percpu_counter API, > that can cause issues on systems with many CPUs, above 24 CPUs. > > After much consideration and different attempts at solving the API > usage. The conclusion is to revert to the simple atomic_t API instead. > > The ratio between batch size and threshold size make it a bad use-case > for the lib/percpu_counter API. As using the correct API calls will > unfortunately cause systems with many CPUs to always execute an > expensive sum across all CPUs. Plus the added complexity is not worth it. Series applied, thanks Jesper.
