From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Westphal Subject: [PATCH nf-next 0/3] netfilter: speed up netns cleanup Date: Mon, 24 Apr 2017 15:37:38 +0200 Message-ID: <20170424133741.2707-1-fw@strlen.de> To: Return-path: Received: from Chamillionaire.breakpoint.cc ([146.0.238.67]:43538 "EHLO Chamillionaire.breakpoint.cc" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1170993AbdDXNh3 (ORCPT ); Mon, 24 Apr 2017 09:37:29 -0400 Sender: netfilter-devel-owner@vger.kernel.org List-ID: low hanging fruits to speed up netns cleanup in netfilter. We're way too happy to issue expensive synchronize_rcu() all over the place. On my test vm 8 processes doing 32 unshare each finish in ~3 minutes, with these patches it gets down to 40 seconds. We could probably further improve this. include/net/netfilter/nf_queue.h | 3 -- net/netfilter/core.c | 55 ++++++++++++++++++++++++++++++++------- net/netfilter/nf_internals.h | 2 - net/netfilter/nf_log.c | 1 net/netfilter/nf_queue.c | 7 +++- net/netfilter/nfnetlink_queue.c | 18 +++++------- 6 files changed, 61 insertions(+), 25 deletions(-)