From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7F8AE426EC8 for ; Tue, 5 May 2026 13:25:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777987512; cv=none; b=MmjB+qTV0tACuy518thk01C2f1CNWFT3cI68HNU67R2Ccr4DJnFQ7TPoVTsdEWlGiOHTRUcf4PuVF6bc6TXkiUKcBgoSL2ysOECKc/66z2WgLjkk/TA9ON3VQEGXGbzPrNkwyjEfiaQ2XpNvBnLY9qM/yXDlA497Gt5VGG+mkUQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777987512; c=relaxed/simple; bh=jjZLXZ3VotsREl0DsXpKQ2oakkN57MTZvYPzwH0Ls2k=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=c7qpkgOQCAAEM9wp7eW45aQrUGcXg7TR0cFf/aMbQCvr3BzNsyvtzFzKRstBuEMbFVKx7e74rziMr2aJgA0hA76MHZiBl0EsPKlOxyRoqjwVY9lcZ7QhQ8hX45WOInfaqRIgknMGOC8hUlpUJKOngcel/3oi4M0XWFQ3IyaIKoQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=F/rQKfw4; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=RSbAZWNK; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="F/rQKfw4"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="RSbAZWNK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777987510; 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: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=NP4rX7b9FZY0fbLuEXjv0M/HU/D303qx0QGgZMGR6PY=; b=F/rQKfw44ND0UxQx4zU36JjWTX2WGK54KXd4A4bqIp5FoffPtt3lW0Eaq25SnZCCTEBb7N 7a++H+y3H30vR+/cjFPmXQ87O/L4HnRM/kZvERp8pM1s+cFeeY2Xs1YouNz8WXcL7fvjqE TrGxeY3UaSvyY+isg+TxUhTlfmHfSw0= Received: from mail-wm1-f72.google.com (mail-wm1-f72.google.com [209.85.128.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-365-ybxufkdxM820RUwoj5EsgA-1; Tue, 05 May 2026 09:25:09 -0400 X-MC-Unique: ybxufkdxM820RUwoj5EsgA-1 X-Mimecast-MFC-AGG-ID: ybxufkdxM820RUwoj5EsgA_1777987508 Received: by mail-wm1-f72.google.com with SMTP id 5b1f17b1804b1-488d8deb75fso44644605e9.3 for ; Tue, 05 May 2026 06:25:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1777987508; x=1778592308; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=NP4rX7b9FZY0fbLuEXjv0M/HU/D303qx0QGgZMGR6PY=; b=RSbAZWNKOBtk1YZfL2WtNVTZ5LEzuj/UPWoewmvx11gZ+L+IvudxwavgNIgnsFPgf4 lLFoJeDtBic3Qy81NlU3/mVEEYrsM+RfcPF1tUUWgW0HdMyVspLdQWGDpPu0/CtJFHr3 h7V0jgDr8uhOxwKrgxatkId2EKz5eMmshuH1NDFcZD+p63i1gLydhdbzjQtVlKkpc5dS RO2aShSCW/ANHQtIecEmGo2NFFCRI0S7WaT/1jhGQNFEfDO6OopMrzvl7a+52tQY+iyO cqzaz09TbTcAzvFkIgoEayXeBMZCBj4GW3Nt87sF0cS+6Xi9trzBOsjDd7abXp5OpERa bp5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777987508; x=1778592308; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=NP4rX7b9FZY0fbLuEXjv0M/HU/D303qx0QGgZMGR6PY=; b=ZSauxgpaCCqqkkzE116uXK/EtlnywcXDsf362gF7ywf2emsUsw5CINbjAcQ7dhQwg3 rs0cLryEgSL5TEESR4P3iiOUDAFqIJONrFklzFlmi6uLMvNSr0/HVy2xQVDkLfPQjcwo XrO2LcMC34G+8sQJbTvkVvB0jk/tqd9ofqp5Q/iFNxQZIoN1ipClIHbxaIO+mllj4tjU auAYWrhC9QSDXdy42LGqHC84KSXznrrzgLCaGTKIpwkzcDHaFkqg/xolQA7aZpSY9ObU 33E7LDr351FqxnT9lcxwmX+xbjniTHksNX7OuxgpEhFJC5W5PKR+EFv8q5Ku5OcEefGP GkEw== X-Forwarded-Encrypted: i=1; AFNElJ9SOEfoc7Cat8jC1CcHE1aSyOYftxmpL1NkSykVXXXxzqhJtC+wj2HvKUkCpLhvBsgt/zA2wrqVsWFdtxt6qhM=@vger.kernel.org X-Gm-Message-State: AOJu0YyldRaLOIqpaOs3LAAvTDjT66RbwI6bDuhzfDl59H4bL3/5T5La UhrTIMkKJYKY1bhqteiXAB01bioq2Xi/HnsQSKz9cfVekJSSWTVUIolpxwbsZJ7d+UC/3Omjkbz WVZ3h1iVQTvjAJ1WI87m2VTu6CGxMh7kejU4nNnHv0Y9qRYTiVzSWI4kRJ5LQG1ilPM4blQ== X-Gm-Gg: AeBDiesS3UwjIS3X1RBThJY/45DmgyKLvSRfT9N4XA+w09wOfY7/FPEqnxRSrxUPcb/ OFSYiOI2VHnYuB3cvIrVSvK5hj0c2XPngZ4DRoU8t1EC6cw21hUzMbAnAw+HpO/fz9DZGirBDKR CN6zi90CFTinYvAWSBbbEhpkooML7KtpN990VW08sDR6wqUZw/fJKUTTBk9yz/yOvAaNdmYK494 rTdJxJHZUdHFfARTo4Lli9Ta2mLVN4LPFhbx8YgKiPMGOiaCE1BivKSK+f2r3IfT9b4UjXvulE6 /TTRxd3YqDvzMY8L2HPKlQ+3mbxcH+ijtQDB+P9AdwIgZzEGA2Sv8ZsLAbkcdvyYnb6F1jgpoX6 CreqfsrYku1tMSkHAdWQYPY1Y3WdJ1wE/WcjRMdN1OegxGGb6rd6+tFLfwtmhpqs+DrI= X-Received: by 2002:a05:600c:4f47:b0:488:b8bc:6a32 with SMTP id 5b1f17b1804b1-48a988be27dmr259135665e9.23.1777987507830; Tue, 05 May 2026 06:25:07 -0700 (PDT) X-Received: by 2002:a05:600c:4f47:b0:488:b8bc:6a32 with SMTP id 5b1f17b1804b1-48a988be27dmr259134965e9.23.1777987507268; Tue, 05 May 2026 06:25:07 -0700 (PDT) Received: from [192.168.88.32] ([212.105.155.47]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a82308d77sm464849375e9.14.2026.05.05.06.25.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 05 May 2026 06:25:06 -0700 (PDT) Message-ID: <0f5da49c-7ed6-4547-9f89-bb3c3d62c3c3@redhat.com> Date: Tue, 5 May 2026 15:25:05 +0200 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net v2 2/2] selftests: openvswitch: add tests for tunnel vport refcounting To: Ilya Maximets , netdev@vger.kernel.org Cc: Aaron Conole , Eelco Chaudron , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Simon Horman , Shuah Khan , Yuan Tan , Yang Yang , dev@openvswitch.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org References: <20260430233848.440994-1-i.maximets@ovn.org> <20260430233848.440994-3-i.maximets@ovn.org> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20260430233848.440994-3-i.maximets@ovn.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/1/26 1:38 AM, Ilya Maximets wrote: > @@ -830,6 +831,42 @@ test_tunnel_metadata() { > return 0 > } > > +test_tunnel_refcount() { > + sbxname="test_tunnel_refcount" > + sbx_add "${sbxname}" || return 1 > + > + ovs_sbx "${sbxname}" ip netns add trefns || return 1 > + on_exit "ovs_sbx ${sbxname} ip netns del trefns" > + > + for tun_type in gre vxlan geneve; do > + info "testing ${tun_type} tunnel vport refcount" > + > + ovs_sbx "${sbxname}" ip netns exec trefns \ > + python3 $ovs_base/ovs-dpctl.py \ > + add-dp dp-${tun_type} || return 1 > + > + ovs_sbx "${sbxname}" ip netns exec trefns \ > + python3 $ovs_base/ovs-dpctl.py \ > + add-if --no-lwt -t ${tun_type} \ > + dp-${tun_type} ovs-${tun_type}0 || return 1 > + > + ovs_wait ip -netns trefns link show \ > + ovs-${tun_type}0 >/dev/null 2>&1 || return 1 > + > + info "deleting dp - may hang if reference counting is broken" > + ovs_sbx "${sbxname}" ip netns exec trefns \ > + python3 $ovs_base/ovs-dpctl.py \ > + del-dp dp-${tun_type} & > + > + dev_removed() { > + ! ip -netns trefns link show "$1" >/dev/null 2>&1 > + } > + ovs_wait dev_removed dp-${tun_type} || return 1 > + ovs_wait dev_removed ovs-${tun_type}0 || return 1 FTR, here sashiko laments that if the reference counting is broken and the del-dp process hangs, this could leave the background del-dp python process running indefinitely. I guess that if reference counting is broken inside the kernel, very likely an host/VM reboot is needed, and the above does not matter. /P