Re: [PATCH 00/16] Remove the ipv4 routing cache
From: David Miller <davem@davemloft.net>
Date: 2012-07-26 21:00:14
From: Eric Dumazet <redacted> Date: Thu, 26 Jul 2012 19:43:53 +0200
On Thu, 2012-07-26 at 19:36 +0200, Eric Dumazet wrote:quoted
On Thu, 2012-07-26 at 19:31 +0200, Eric Dumazet wrote:quoted
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.Something like : (on top of latest David patch)
Grrr, I only got the local routes didn't I? :-) That would explain everything.