On Thu, 2012-07-26 at 19:31 +0200, Eric Dumazet wrote:

On Thu, 2012-07-26 at 10:18 -0700, Alexander Duyck wrote:

quoted

I tested this patch and it looks like it runs, but still has the same
performance issue.  I did some digging into the annotation for
ip_route_intput_noref and it seems like the issue is that I am hitting
the dst_hold call in  __mkroute_input.

David suggested a percpu cache.

nh_rth_input would be allocated by alloc_percpu(struct dst *)

I can work on this.

Wait a minute, on input we should use the noref trick too.