From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 4CD9E41D23A for ; Thu, 24 Sep 2026 18:01:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790272884; cv=none; b=dYASKAVzVMdah9SmVUJI9jt24ZUnfYBMQVKq5FdEelfVsb9Nm23iWa6Wb0CTOlTa8n1Uhg0Tku1+8uw5XxWMiijsNKs3t9/5XcQ83kyOIIUMwshF4KrTFIs15uBvSpmAAMhXnB4ZqGpH+/Wgy7jOE5qHSHpwDnZ6qGuGk177FBo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790272884; c=relaxed/simple; bh=8zUknIt/ePwhd/LddkBiHSk15y43HRK6Lo4gAVu1+Fw=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=gRSUhh2OEEHGm4tbRDSH7Fb7nFWAa8H+UO6vqcMplSIzoBSgiQfaEivnNYU5aSzYsx0esfOr2LRYAYtqK//jJb4TUN+fhIeK7vm1lqjHqD6OPBeFlE9iRzK3LXiAV3MBEZCXmY64urcBP+oSDdzOWvS+KoHfuV/ha/gmrQD7hr8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YzGFm7Nb; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YzGFm7Nb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 322901F00899; Thu, 24 Sep 2026 18:01:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790272883; bh=PUAIRbR38n1VnKaj0e/uBt+4cjIAazyRZgXOu191Hr4=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=YzGFm7NbXwRBfmsZUDU7VfN5Ic1SydnxpYrWDfGo1Wxfz/M2bwnECOGmSNMx6vla2 xnjS9fut3RcOypw8Xp2XKThJlaIJrIIuqxtnqK3zqPd7FcubZA2u2gsG2h7rEdK/hi +4fl8vykJATM5FVLgkMnBkpO7JCfvbGO/DyfnEMF1LoKYBQHWvIkybLSClJRndDdXB KYIjJY6lH0KnCFtRe/k5G9pqILHVSiJcn+J20e7+AlBoQjTk8SeSpn/2RSe0uUyvbA S8ha1LiYkLyxsXbj8bWAL8D8X0bmuhtXnQuYQ33k7/OMw92Ho6INAghS3vkE7j4O9c cM8z/0S0dSmGg== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 5695C3A566DD; Thu, 24 Sep 2026 18:00:13 +0000 (UTC) Content-Type: text/plain; charset="utf-8" Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v2 net] net: flush skb_defer_nodes in dev_cpu_dead() From: patchwork-bot+netdevbpf@kernel.org Message-Id: <179027281189.1685480.10772123660048220576.git-patchwork-notify@kernel.org> Date: Thu, 24 Sep 2026 18:00:11 +0000 References: <20260923130318.607255-1-edumazet@google.com> In-Reply-To: <20260923130318.607255-1-edumazet@google.com> To: Eric Dumazet Cc: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, netdev@vger.kernel.org, eric.dumazet@gmail.com, edumazet@kernel.org, kris.pan@intel.com Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski : On Wed, 23 Sep 2026 13:03:18 +0000 you wrote: > When a CPU goes offline, dev_cpu_dead() drains its softnet queues > (completion_queue, output_queue, poll_list, process_queue, and > input_pkt_queue), but leaves net_hotdata.skb_defer_nodes untouched. > > If oldcpu goes offline while holding pending skbs in its > skb_defer_nodes lists (e.g. below the sysctl_skb_defer_max >> 1 IPI > threshold, or if the IPI races with CPU teardown), those skbs remain > stranded until oldcpu is brought back online. If any of these skbs > hold page_pool fragments, page_pool_destroy() will stall indefinitely > waiting for inflight pages to be returned when a netdev or driver is > torn down while oldcpu is offline. > > [...] Here is the summary with links: - [v2,net] net: flush skb_defer_nodes in dev_cpu_dead() https://git.kernel.org/netdev/net/c/06e3f54e8b22 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html