netdev - Re: [PATCH net-next v5 12/14] tls/sw: Convert tls_sw_sendpage() to use MSG_SPLICE

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Date: Wed, 7 Jun 2023 10:20:22 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: David Howells <dhowells@...hat.com>
Cc: netdev@...r.kernel.org, Linus Torvalds <torvalds@...ux-foundation.org>,
 Chuck Lever <chuck.lever@...cle.com>, Boris Pismenny <borisp@...dia.com>,
 John Fastabend <john.fastabend@...il.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Willem de Bruijn <willemdebruijn.kernel@...il.com>,
 David Ahern <dsahern@...nel.org>, Matthew Wilcox <willy@...radead.org>,
 Jens Axboe <axboe@...nel.dk>, linux-mm@...ck.org,
 linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH net-next v5 12/14] tls/sw: Convert tls_sw_sendpage() to
 use MSG_SPLICE_PAGES

On Wed,  7 Jun 2023 15:05:57 +0100 David Howells wrote:
> Convert tls_sw_sendpage() and tls_sw_sendpage_locked() to use sendmsg()
> with MSG_SPLICE_PAGES rather than directly splicing in the pages itself.
> 
> [!] Note that tls_sw_sendpage_locked() appears to have the wrong locking
>     upstream.  I think the caller will only hold the socket lock, but it
>     should hold tls_ctx->tx_lock too.
> 
> This allows ->sendpage() to be replaced by something that can handle
> multiple multipage folios in a single transaction.

Reviewed-by: Jakub Kicinski <kuba@...nel.org>