From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24AD4C77B70 for ; Tue, 11 Apr 2023 14:30:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230245AbjDKOa4 (ORCPT ); Tue, 11 Apr 2023 10:30:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38082 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230341AbjDKOaf (ORCPT ); Tue, 11 Apr 2023 10:30:35 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:237:300::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7F8026194 for ; Tue, 11 Apr 2023 07:30:01 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1pmF0J-0002Lp-OV; Tue, 11 Apr 2023 16:29:51 +0200 From: Florian Westphal To: Cc: Florian Westphal Subject: [PATCH nf-next 0/3] netfilter: nf_tables: shrink jump stack size Date: Tue, 11 Apr 2023 16:29:44 +0200 Message-Id: <20230411142947.9038-1-fw@strlen.de> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netfilter-devel@vger.kernel.org This series reworks nf_tables evaluation loop so that only the next rule to run after returning from the chain needs to be saved. This reduces nft_do_chain stack usage from 600 to 328 bytes. There is more potential for reduction of stack usage by dieting the traceinfo structure, I will look into this next. Florian Westphal (3): netfilter: nf_tables: merge nft_rules_old structure and end of ruleblob marker netfilter: nf_tables: don't store address of last rule on jump netfilter: nf_tables: don't store chain address on jump include/net/netfilter/nf_tables.h | 14 ++++++-- net/netfilter/nf_tables_api.c | 56 +++++++++++++------------------ net/netfilter/nf_tables_core.c | 29 +++++----------- net/netfilter/nf_tables_trace.c | 30 ++++++++++++++--- 4 files changed, 70 insertions(+), 59 deletions(-) -- 2.39.2