On Mon, 31 Jul 2017 10:18:57 -0700 Shaohua Li <s...@kernel.org> wrote:
> From: Shaohua Li <s...@fb.com> > > In a syn flooding test, the fib6_table rwlock is a significant > bottleneck. While converting the rwlock to rcu sounds straighforward, > but is very challenging if it's possible. A percpu spinlock is quite > trival for this problem since updating the routing table is a rare > event. In my test, the server receives around 1.5 Mpps in syn flooding > test without the patch in a dual sockets and 56-CPU system. With the > patch, the server receives around 3.8Mpps, and perf report doesn't show > the locking issue. > > Cc: Wei Wang <wei...@google.com> You just reinvented brlock... RCU is not that hard, why not do it right?
