From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 A88F914A4DE; Mon, 11 Nov 2024 23:30:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731367822; cv=none; b=bpOIwN4l+05aAGCG2TcUTCICkOrfLGAMYmO4HpcoHaOPkbD4FSekH4uXgc9zzljdAsSUFRkprecqsaUjccmYZDsM+0oTQ1wf5Ki8p18mZbejnkFJdIDZAvkA38JyDAg1QiGUo94NSOMC66aqQ94Ie3+mhLJOQCRg9SIY1e0VSn4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731367822; c=relaxed/simple; bh=lDnSkZUHCR6JXViDwq+7vD0Xg+BLr/GTDPrxYsx/bfM=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=fem2CkmdXDprNBUE/i2bzfOi/fuRAqzJcTmJ4JJmlaWHFSUhWXSczTm16ixGa5aOjhWgrV18Maj9FJc8VV0nkiXchIyL2HzcXnOAP30aYS+JYzSIvpYlX0nhyn0OveYUtuLwcTd7kCeAO/xUMDyZFVfwTEIKxLxPQbXjWqgknI0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DGt17e6d; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DGt17e6d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3018CC4CECF; Mon, 11 Nov 2024 23:30:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731367822; bh=lDnSkZUHCR6JXViDwq+7vD0Xg+BLr/GTDPrxYsx/bfM=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=DGt17e6dNjeWTUx/yQNSxwZWMRLRunoGdGOQKxJGqKUJaORL1jUrCUAPpdb/kV/6H EbBrJLWzLNCaW39+ae14wDkhEQdVgPBXL7OFlOHzOeqJHim1v5aKzeVX2kBzYtQyjX f5AdLSDXMFHbTM4cKsl9Sn7YroMu0FkX6Hips7m0tCwxW644ZSdl2+out7pr94m0jP AQ6+CsQz32JbxMTRpszHPlRj/zPgRsHuraxnYBMPxoJ4pjEESOoRvboKAsEuAJcGil +1cBA4Y/CYoMzzYuPCV4hGZJnphtn6JD706z/tW3jhE/pO2yY54Szg+P85xL5Qp0kZ eqiOTezZgVong== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 713303809A80; Mon, 11 Nov 2024 23:30:33 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH net-next v7] ipv6: Fix soft lockups in fib6_select_path under high next hop churn From: patchwork-bot+netdevbpf@kernel.org Message-Id: <173136783228.10093.17478137468626631969.git-patchwork-notify@kernel.org> Date: Mon, 11 Nov 2024 23:30:32 +0000 References: <20241106010236.1239299-1-omid.ehtemamhaghighi@menlosecurity.com> In-Reply-To: <20241106010236.1239299-1-omid.ehtemamhaghighi@menlosecurity.com> To: Omid Ehtemam-Haghighi Cc: netdev@vger.kernel.org, adrian.oliver@menlosecurity.com, kernel@aoliver.ca, davem@davemloft.net, dsahern@gmail.com, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, shuah@kernel.org, idosch@idosch.org, kuniyu@amazon.com, horms@kernel.org, oeh.kernel@gmail.com, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Hello: This patch was applied to netdev/net-next.git (main) by Jakub Kicinski : On Tue, 5 Nov 2024 17:02:36 -0800 you wrote: > Soft lockups have been observed on a cluster of Linux-based edge routers > located in a highly dynamic environment. Using the `bird` service, these > routers continuously update BGP-advertised routes due to frequently > changing nexthop destinations, while also managing significant IPv6 > traffic. The lockups occur during the traversal of the multipath > circular linked-list in the `fib6_select_path` function, particularly > while iterating through the siblings in the list. The issue typically > arises when the nodes of the linked list are unexpectedly deleted > concurrently on a different core—indicated by their 'next' and > 'previous' elements pointing back to the node itself and their reference > count dropping to zero. This results in an infinite loop, leading to a > soft lockup that triggers a system panic via the watchdog timer. > > [...] Here is the summary with links: - [net-next,v7] ipv6: Fix soft lockups in fib6_select_path under high next hop churn https://git.kernel.org/netdev/net-next/c/d9ccb18f83ea You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html