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 5C9CE3EA66; Tue, 4 Aug 2026 00:36:16 +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=1785803777; cv=none; b=mW/wESSdebRdXr47NuBfI8N3pl3fRhsBVEW/zrMp9Z6VdfeyOxTgd3e2t/j2VbxgbGNMv7b+3UaQB0oFQlvkokoLgc2mGWOkecZ1ZWwYJna6HVPBMkniQoxmZe0Jt0MwaSTMDhS2/ZbY3wBKCPcUChrgXLM2DXBHXIXn2n91mig= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785803777; c=relaxed/simple; bh=owUZO0GaruEeUom+rYgZQVjvxQGPUrrqdGEx8tSnuLI=; h=MIME-Version:Date:From:To:Cc:Message-Id:In-Reply-To:References: Subject:Content-Type; b=B6VnhE/t0mnNjYUG8QERGRiYm7jV2toaHM57UBw56upsRtp0adVpeO057jl9OXNOT8MBzbDKZ/PQDJn6kKJRBgAnJkjuoc2JFOHNQGXjuFdfh0t2ISeSNco413FUQ0TCSQhoen+pzReot2WHEzfy5OK98KZfuqURbmEMf9vDTFs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hq/jM21F; 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="hq/jM21F" Received: by smtp.kernel.org (Postfix) with ESMTPSA id ADE521F00A3D; Tue, 4 Aug 2026 00:36:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785803776; bh=owUZO0GaruEeUom+rYgZQVjvxQGPUrrqdGEx8tSnuLI=; h=Date:From:To:Cc:In-Reply-To:References:Subject; b=hq/jM21FWSX3Z89SruuLfvM7Xi31dgVKTsyMutOCIfVsiWmYrJruyXHWn+rKiEl6O DtnwGARRtPSIbUP2Ve/XknMO0cmLaHHLZxNA9eI44pLq8CZOAngclcnHPLFSltXK19 yrm3kjDNRWezyXSFMF1BjBK7n9GzJyuQ7rlodEZv8+W3LRRf6F4Mq5hCLZbI+bAoIa CAWAX/w7s+0IgpHfx0KOBG4f4F4Io0+pYEk2tQUcYAbdEI0mfoDQ6TYLRV8fAeHuu4 zS5xi3llV7QuVdViGzW6tOLNUr6n962VZZbb3qJhrdbT8zvJ3THinEQLp3W+qp02Bu fEM21BBEE6qRA== Received: from phl-compute-10.internal (phl-compute-10.internal [10.202.2.50]) by mailfauth.phl.internal (Postfix) with ESMTP id 8F8DAF40068; Mon, 3 Aug 2026 20:36:14 -0400 (EDT) Received: from phl-imap-15 ([10.202.2.104]) by phl-compute-10.internal (MEProxy); Mon, 03 Aug 2026 20:36:14 -0400 X-ME-Sender: X-ME-Proxy-Cause: dmFkZTEL3Nm7825IrFWzPhaZR8Uj6YcDqdW1PuqBBrA9DvhaC8lzAhc0G1SmrkTiRcRjo2 Cjcsk6kGRxISyDZZpgKw3U8UTsUEQV+fMG9Qb4tSOJJvgSy9J8zoR0X83YNg0nWfnSe7Na yIYB1rACc8OJebEMZJgmvDbbVtmrkM06MApbk8C/wbuIprrx0YB6sat6UKJLMKzbhj01Bl DhpVKiNjC5jrt5PIQu5igDLxfLPWRTo7JiXnw8agW2/B8/nvb4+j1dOxxqJBIdaGhJtbId ghlv7Cl8REH2xgZC8+ZZZNn2wRdKgNLYvM+V3Voy437WorqcF809/jUHlXSoNoJdsYWfEr JTSHfaJQbTCylGJK0P++FanMnse8/130GCoAfV829mdxXdJjXc9OhQ8LxJo5p9q9TH/k8x kTcDLBKRy57ed/ChRbsRJ7eMNYcGhSQS6Fb4iIoHHH5xuJ9AQOcDTBrJMOnxoOL9b9eJ5s RUcjqzuzQIIuunpaCOrutsu5Jvnzyf9vcHYNPhJfDW9hs1Rr87LjN5P9tM06URECh98j5o 6lz6pSFTbeu5XHtS+SNGE7wcPZIx0B3kMUqpW9J8V9tMDeoQqYuKq7fVc88gtiKRxmLLbL jUDklzxnA3S1mzhTeaYGILjsWd0nRRvFURR8QOKt4Olk42rJn5VeCQ8j+o2A X-ME-Proxy: Feedback-ID: ifa6e4810:Fastmail Received: by mailuser.phl.internal (Postfix, from userid 501) id 6CAFF780070; Mon, 3 Aug 2026 20:36:14 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Mon, 03 Aug 2026 20:35:54 -0400 From: "Chuck Lever" To: "Jakub Kicinski" Cc: "John Fastabend" , "Sabrina Dubroca" , "David S. Miller" , "Eric Dumazet" , "Paolo Abeni" , "Simon Horman" , "Shuah Khan" , netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Message-Id: In-Reply-To: <20260803153905.09f1ba0b@kernel.org> References: <20260726-tls-follow-on-v1-0-99bf4cc1c729@kernel.org> <20260726-tls-follow-on-v1-1-99bf4cc1c729@kernel.org> <20260803153905.09f1ba0b@kernel.org> Subject: Re: [PATCH net 1/9] net/tls: Bound time spent on no-data records in tls_sw_read_sock() Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Mon, Aug 3, 2026, at 6:39 PM, Jakub Kicinski wrote: > On Sun, 26 Jul 2026 20:33:29 -0400 Chuck Lever wrote: >> +/* Bound the time that consecutive empty ingress data records keep >> + * the socket lock held without releasing it. >> + */ >> +#define TLS_RX_NODATA_NS NSEC_PER_MSEC > > A time bound is a bad idea in the kernel, a softirq can easily=20 > take >1msec and turn 2 consecutive zero length records into > a fatal error for the connection. I don=E2=80=99t have a particular dog in this race, but you and Sabrina = need to thumb wrestle to decide which way this needs to go. My original thought was to use a count of zero-length packets. --=20 Chuck Lever