From: "Chuck Lever" <cel@kernel.org>
To: john.fastabend@gmail.com, "Jakub Kicinski" <kuba@kernel.org>,
"Sabrina Dubroca" <sd@queasysnail.net>
Cc: netdev@vger.kernel.org, kernel-tls-handshake@lists.linux.dev,
"Chuck Lever" <chuck.lever@oracle.com>,
"Hannes Reinecke" <hare@suse.de>
Subject: Re: [PATCH PATCH net-next v4 8/8] tls: Enable batch async decryption in read_sock
Date: Mon, 23 Mar 2026 17:28:27 -0400 [thread overview]
Message-ID: <0cf288bb-6ab1-4f2b-8a7f-727b3e1fe0d2@app.fastmail.com> (raw)
In-Reply-To: <20260317-tls-read-sock-v4-8-ab1086ec600f@oracle.com>
On Tue, Mar 17, 2026, at 11:04 AM, Chuck Lever wrote:
> From: Chuck Lever <chuck.lever@oracle.com>
>
> tls_sw_read_sock() decrypts one TLS record at a time, blocking until
> each AEAD operation completes before proceeding. Hardware async
> crypto engines depend on pipelining multiple operations to achieve
> full throughput, and the one-at-a-time model prevents that. Kernel
> consumers such as NVMe-TCP and NFSD (when using TLS) are therefore
> unable to benefit from hardware offload.
>
> When ctx->async_capable is true, the submit phase now loops up to
> TLS_READ_SOCK_BATCH (16) records.
It appears that async_capable is always false for TLSv1.3. Since
TLSv1.3 is a hard requirement for both NVMe/TCP and RPC-with-TLS,
patch 8/8 is moot for us. For the moment, I'm going to drop this
one from the series. Once Alistair's KeyUpdate work is merged, we
can revisit.
--
Chuck Lever
next prev parent reply other threads:[~2026-03-23 21:28 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-17 15:04 [PATCH net-next v4 0/8] TLS read_sock performance scalability Chuck Lever
2026-03-17 15:04 ` [PATCH PATCH net-next v4 1/8] tls: Factor tls_decrypt_async_drain() from recvmsg Chuck Lever
2026-03-17 19:55 ` Breno Leitao
2026-03-19 17:21 ` Sabrina Dubroca
2026-03-20 1:03 ` Chuck Lever
2026-03-17 15:04 ` [PATCH PATCH net-next v4 2/8] tls: Abort the connection on decrypt failure Chuck Lever
2026-03-23 10:22 ` Sabrina Dubroca
2026-03-17 15:04 ` [PATCH PATCH net-next v4 3/8] tls: Fix dangling skb pointer in tls_sw_read_sock() Chuck Lever
2026-03-17 15:04 ` [PATCH PATCH net-next v4 4/8] tls: Factor tls_strp_msg_release() from tls_strp_msg_done() Chuck Lever
2026-03-17 15:04 ` [PATCH PATCH net-next v4 5/8] tls: Suppress spurious saved_data_ready on all receive paths Chuck Lever
2026-03-23 10:32 ` Sabrina Dubroca
2026-03-17 15:04 ` [PATCH PATCH net-next v4 6/8] tls: Flush backlog before waiting for a new record Chuck Lever
2026-03-17 15:04 ` [PATCH PATCH net-next v4 7/8] tls: Restructure tls_sw_read_sock() into submit/deliver phases Chuck Lever
2026-03-23 11:31 ` Sabrina Dubroca
2026-03-17 15:04 ` [PATCH PATCH net-next v4 8/8] tls: Enable batch async decryption in read_sock Chuck Lever
2026-03-23 14:14 ` Sabrina Dubroca
2026-03-23 15:04 ` Chuck Lever
2026-03-23 23:08 ` Sabrina Dubroca
2026-03-24 13:17 ` Chuck Lever
2026-03-24 22:58 ` Sabrina Dubroca
2026-03-23 15:53 ` Chuck Lever
2026-03-23 21:28 ` Chuck Lever [this message]
2026-03-23 21:41 ` Jakub Kicinski
2026-03-23 22:48 ` Sabrina Dubroca
2026-03-24 12:44 ` Chuck Lever
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