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 X-Spam-Level: X-Spam-Status: No, score=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EB36EC433EF for ; Tue, 21 Sep 2021 15:32:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE265610E8 for ; Tue, 21 Sep 2021 15:32:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233981AbhIUPdj (ORCPT ); Tue, 21 Sep 2021 11:33:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51024 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233821AbhIUPdf (ORCPT ); Tue, 21 Sep 2021 11:33:35 -0400 Received: from Chamillionaire.breakpoint.cc (Chamillionaire.breakpoint.cc [IPv6:2a0a:51c0:0:12e:520::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A911C061574 for ; Tue, 21 Sep 2021 08:32:06 -0700 (PDT) Received: from fw by Chamillionaire.breakpoint.cc with local (Exim 4.92) (envelope-from ) id 1mShkZ-0007I9-LF; Tue, 21 Sep 2021 17:32:03 +0200 Date: Tue, 21 Sep 2021 17:32:03 +0200 From: Florian Westphal To: Jakub Kicinski Cc: Alexander Kuznetsov , netdev@vger.kernel.org, zeil@yandex-team.ru Subject: Re: [PATCH] ipv6: enable net.ipv6.route sysctls in network namespace Message-ID: <20210921153203.GK15906@breakpoint.cc> References: <20210921062204.16571-1-wwfq@yandex-team.ru> <20210921060909.380179f0@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210921060909.380179f0@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Jakub Kicinski wrote: > On Tue, 21 Sep 2021 09:22:04 +0300 Alexander Kuznetsov wrote: > > We want to increase route cache size in network namespace > > created with user namespace. Currently ipv6 route settings > > are disabled for non-initial network namespaces. > > Since routes are per network namespace it is safe > > to enable these sysctls. Are routes accounted towards memcg or something like that? Otherwise userns could start eating up memory by cranking the limit up to 11 and just adds a gazillion routes?