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 DC8C42E974D; Thu, 30 Jul 2026 00:20:50 +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=1785370855; cv=none; b=IPOKfDq7oBJMXTfiov1bmRC6OMA4ykexTqzc3plww8VW0AOnmtRp7N6giBsEq+xVYZccfR4JmrSIR7sW/ijwAnzQ9T7Bv79VVML8xqyMtH8J3UdRy99+pS8I8tmPlkL1zbIw/O4u1OeL2YaiC9M2JyUMTPW3d1NSM5iogE2bYro= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785370855; c=relaxed/simple; bh=MCvOERHoQ1utAVyBxtRKjPVQqF2sFvORAss1VbsTkWQ=; h=Content-Type:MIME-Version:Subject:From:Message-Id:Date:References: In-Reply-To:To:Cc; b=NA0f36vkWG0bi+jNldcC93RL0qK/vzA7iHKm5lPkgVsrO0owbOMHFiqQ2davzzs7H4FBbYnUiRGKdrxWh6mqMVyRtb/pCO0kpKCj7RJLZMX5VSPOPDj1bCRDPs6jx/12YQYtwX0sfxUKY/n7UygIAO5U+U4EhsbT0+2PAro4Cl4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VmiXSpVa; 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="VmiXSpVa" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2B6111F000E9; Thu, 30 Jul 2026 00:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785370848; bh=Y/ar3p1LYVEouOsJQKs8P3xplzoQODF9Duqlif8Y8ew=; h=Subject:From:Date:References:In-Reply-To:To:Cc; b=VmiXSpVaoEF8+TNSMF8PWojUVW3wDykLCtyIXz6OAYNqt4MkBnsoPJDfe8gv9imAx Bxs0rInvkFI4ZePPLv/kKM1hOWHdGHNo49O3n/iagB3F/9jX2Y7osfsuEqcAdlGPRO 1OO2RBQC3Zrr0VUFW12iHo008BijUCRlG9C6OIHZleiPO33YLVsMTn8wJdhvnu0Qwy IlXRvRndnDGncbQ8QxuzMNhvgcuje+/B6cbacTOcDcIXiMeatEOJrrO7rIDjl+G2xA skgTfARIDBYGHXJk0SbIy9rMwQe5WEKs1URffm9ST8LLt+YlRKt17F0EOha+8vwii4 Qa1DoMzNQWKlQ== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 56B3B3926250; Thu, 30 Jul 2026 00:20:13 +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 net 0/4] Revert "tun/tap & vhost-net: apply qdisc backpressure on full ptr_ring to reduce TX drops" From: patchwork-bot+netdevbpf@kernel.org Message-Id: <178537081189.3294584.1292356149475658515.git-patchwork-notify@kernel.org> Date: Thu, 30 Jul 2026 00:20:11 +0000 References: <20260728092240.250257-1-simon.schippers@tu-dortmund.de> In-Reply-To: <20260728092240.250257-1-simon.schippers@tu-dortmund.de> To: Simon Schippers Cc: netdev@vger.kernel.org, willemdebruijn.kernel@gmail.com, jasowangio@gmail.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, mst@redhat.com, eperezma@redhat.com, horms@kernel.org, tim.gebauer@tu-dortmund.de, brett@librecast.net, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org Hello: This series was applied to netdev/net.git (main) by Jakub Kicinski : On Tue, 28 Jul 2026 11:22:36 +0200 you wrote: > Commit 1d6e569b7d0c ("tun/tap & vhost-net: avoid ptr_ring tail-drop when > a qdisc is present") did not show a relevant performance regression in my > testing, but on Brett Sheffield's librecast testbed it causes a > significant throughput drop in an IPv6 multicast testcase. The regression > can be pinpointed to multiple iperf3 TCP threads sending: for 8 threads > the throughput dropped from 13.5 Gbit/s to 9.13 Gbit/s. > > [...] Here is the summary with links: - [net,1/4] Revert "tun/tap & vhost-net: avoid ptr_ring tail-drop when a qdisc is present" https://git.kernel.org/netdev/net/c/f11b48aa674b - [net,2/4] Revert "ptr_ring: move free-space check into separate helper" https://git.kernel.org/netdev/net/c/6bc85579c3bb - [net,3/4] Revert "vhost-net: wake queue of tun/tap after ptr_ring consume" https://git.kernel.org/netdev/net/c/8f83be72d9f5 - [net,4/4] Revert "tun/tap: add ptr_ring consume helper with netdev queue wakeup" https://git.kernel.org/netdev/net/c/c3da92af07ea You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html