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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 50243C33CAF for ; Mon, 13 Jan 2020 21:39:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 24B28214AF for ; Mon, 13 Jan 2020 21:39:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Y4gYVmyQ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728874AbgAMVjd (ORCPT ); Mon, 13 Jan 2020 16:39:33 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:43275 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728872AbgAMVjb (ORCPT ); Mon, 13 Jan 2020 16:39:31 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578951570; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type; bh=TmF8Hv16sY6iJmWP2Q5PWZP+/c4UXh4RIugFKiSyM4M=; b=Y4gYVmyQFbevgkTZXeToDI/RiStr1pv4g8TidyNmnaKwwA2zqf029eDiQOPBYZ5f9kjBHH f9VPAoeJRiMs9UEG6wF42DFHTx4L33EJlkNP6AL/EB7i6dCd1IwsjgVpAp26BqPk2F7aiW VL2OfJ/ILa7LHZC6UUXn8QIawwc5eB8= Received: from mail-wm1-f69.google.com (mail-wm1-f69.google.com [209.85.128.69]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-90-pdoqTWUHN_a35CWO6il_sw-1; Mon, 13 Jan 2020 16:39:29 -0500 X-MC-Unique: pdoqTWUHN_a35CWO6il_sw-1 Received: by mail-wm1-f69.google.com with SMTP id 7so1587500wmf.9 for ; Mon, 13 Jan 2020 13:39:29 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition; bh=TmF8Hv16sY6iJmWP2Q5PWZP+/c4UXh4RIugFKiSyM4M=; b=lGbentTuHww8oY7a2bxx1qn7D2swIIKE5yrj/aCelv7sf1tkJkROzseaNeiJWS3Dd5 lnWrXPVle6BY0bjm93hPxTLNvAbJhD4GptxiHXvRwuA5xhaI4aG0+CGtlNe2rYrZ70IB NpFwtRUcYy/xpVm8tgokNqVXgEJgXEmoKHFxeAKrdfHU2RIpN821CUfnutKtQuKgQD8q 8kN6p69Z6WMxNdA94GeashLQOSQAseQALKEKNZidD3uA3IdOTgEDD6fkiPRDzFdcuiNH csW5W3pSyuQrqlQdMkPnnYJ1WAhylVs0FWiuptX8ifuJKk7LRl6ycfBMNTQ8Ap3XKhUy 8hFQ== X-Gm-Message-State: APjAAAUi5BjPSHL6aIBaeVFmc9iec1gI67BlIXrNovHFsdnl2Tkd7Vd0 25uuwRql5ygFCVFSyjBPKpRL9M4+lbl9vV/yHyKhqgrFd3XL8bL31DvFADYGsolsP3BH5ycYkTI AlFWvhIsQK1awgVPH X-Received: by 2002:a1c:2187:: with SMTP id h129mr23339869wmh.44.1578951562186; Mon, 13 Jan 2020 13:39:22 -0800 (PST) X-Google-Smtp-Source: APXvYqwQVnfO9XsQDl1igCpWaIkCzLDDwnyC/rvtEPCuLgtj0dI9m+7clOdMkyIAd+CJxQhQFBbGjQ== X-Received: by 2002:a1c:2187:: with SMTP id h129mr23339848wmh.44.1578951561929; Mon, 13 Jan 2020 13:39:21 -0800 (PST) Received: from linux.home (2a01cb058a4e7100d3814d1912515f67.ipv6.abo.wanadoo.fr. [2a01:cb05:8a4e:7100:d381:4d19:1251:5f67]) by smtp.gmail.com with ESMTPSA id e18sm16934631wrr.95.2020.01.13.13.39.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Jan 2020 13:39:21 -0800 (PST) Date: Mon, 13 Jan 2020 22:39:19 +0100 From: Guillaume Nault To: David Miller , Jakub Kicinski Cc: netdev@vger.kernel.org, Nicolas Dichtel Subject: [PATCH net-next 0/3] netns: Optimise netns ID lookups Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Netns ID lookups can be easily protected by RCU, rather than by holding a spinlock. Patch 1 prepares the code, patch 2 does the RCU conversion, and finally patch 3 stops disabling BHs on updates (patch 2 makes that unnecessary). Guillaume Nault (3): netns: Remove __peernet2id_alloc() netns: protect netns ID lookups with RCU netns: don't disable BHs when locking "nsid_lock" net/core/net_namespace.c | 93 ++++++++++++++++------------------------ 1 file changed, 38 insertions(+), 55 deletions(-) -- 2.21.1