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=-5.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,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 B207CC433FB for ; Mon, 20 Jul 2020 15:45:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 875E222CAF for ; Mon, 20 Jul 2020 15:45:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Q4cyqP7c" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729960AbgGTPpe (ORCPT ); Mon, 20 Jul 2020 11:45:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39862 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729746AbgGTPpd (ORCPT ); Mon, 20 Jul 2020 11:45:33 -0400 Received: from mail-qk1-x742.google.com (mail-qk1-x742.google.com [IPv6:2607:f8b0:4864:20::742]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6ABB2C061794; Mon, 20 Jul 2020 08:45:33 -0700 (PDT) Received: by mail-qk1-x742.google.com with SMTP id d14so4040283qke.13; Mon, 20 Jul 2020 08:45:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=7wm0oMA29Q1w+zSeZjjlRnkZAL7H3qOLrO6VrVSXeHw=; b=Q4cyqP7ciSayfcBJcyYV9UOx+KwWVGGMtvXyo+/pPX+MMLSUAPeLlTB7iA7fCTV/Gh 8EgSvSSwnGxET1RZafj/RcXQHnCDu7WfDCC9/xIjCsTXTJNc28PIPENb9qHqZyc2PHtP EaaNFrqqv9FaujNa2Jyx+/rKm/hywm6M+mjyKckR9UuAHpJcIT0fs6IqyYY1embBQaE6 CNUISapqPDPPpPSJKNbZ7GKNaPZMWSiKlXkoDXXNaImWjiGN/505oDlu9SgAuKJKmcd/ 2otYVDEDb9AQHrc1N0zyxdj1rpOJlSqlAdnEnQcYfxJQaALSUQOrbVWpKEV/u6NWGc8Y jqnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=7wm0oMA29Q1w+zSeZjjlRnkZAL7H3qOLrO6VrVSXeHw=; b=oTkJW1EvRg+UCE2oiTsBKzZuGVzyKDxZciBJ0aYtPdeUkcSHPsxN89oJUO9pHEfwRY VkqvrEK0eiJRt8PYGBVe7lC/aRspeoE/7apyENsZ39H7EAmqp6JwvzRIEmICV2qctV/o ooWl4tuQZF420EpwlZCgUyVuzDS0rOx5cXs5kDybWnHMJIBUc6m6p5v3Q+r3dcZnrwZa pze5Q2PKthk+Lwp7Alxclzty/0AaYz/1/4Wi0vCYk4dn7CmnH9wZ+JZtZDh52PUk1plF fBpK97R3BZAwojIUWDCcEKaGrQ4m8s7x2kBBGh+z0pCB1v1mc6O5h5I+4LT6a0wVjBii BpnQ== X-Gm-Message-State: AOAM530orf0y9Cdk1GcpQ3/L96sc0xPVix5kK1JHGSMG9eDpZCPRcz/p sq7ebKR6biKDDvUZqKuC0Ms= X-Google-Smtp-Source: ABdhPJxE+cZBrKwC0TzIZBKJkkIEVhZ7GLKC7+l1E21bCB2PeLyFzrZXWTc7tiD9J1DOQ1A6Crd4mQ== X-Received: by 2002:a37:27c2:: with SMTP id n185mr21110967qkn.459.1595259932718; Mon, 20 Jul 2020 08:45:32 -0700 (PDT) Received: from ?IPv6:2601:282:803:7700:247a:2d5a:19c4:a32f? ([2601:282:803:7700:247a:2d5a:19c4:a32f]) by smtp.googlemail.com with ESMTPSA id j72sm8765112qke.20.2020.07.20.08.45.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 20 Jul 2020 08:45:32 -0700 (PDT) Subject: Re: [PATCH bpf-next] bpf: cpumap: fix possible rcpu kthread hung To: Jakub Sitnicki , Lorenzo Bianconi Cc: netdev@vger.kernel.org, bpf@vger.kernel.org, davem@davemloft.net, ast@kernel.org, brouer@redhat.com, daniel@iogearbox.net, lorenzo.bianconi@redhat.com, kuba@kernel.org References: <874kq2y2cy.fsf@cloudflare.com> From: David Ahern Message-ID: Date: Mon, 20 Jul 2020 09:45:29 -0600 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <874kq2y2cy.fsf@cloudflare.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 7/20/20 3:14 AM, Jakub Sitnicki wrote: > I realize it's a code move, but fd == 0 is a valid descriptor number. this follows the decision made for devmap entries in that fd == 0 is NOT a valid program fd.