netdev - Re: [PATCH net-next] tcp: defer sacked assignment

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Message-ID: <CADVnQyntPQUJTS6FzTDRVZML8TDJT5Qv=VU4XGtwZOWT81CU_w@mail.gmail.com>
Date:	Wed, 17 Aug 2016 10:53:21 -0400
From:	Neal Cardwell <ncardwell@...gle.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>
Subject: Re: [PATCH net-next] tcp: defer sacked assignment

On Wed, Aug 17, 2016 at 10:48 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> From: Eric Dumazet <edumazet@...gle.com>
>
> While chasing tcp_xmit_retransmit_queue() kasan issue, I found
> that we could avoid reading sacked field of skb that we wont send,
> possibly removing one cache line miss.
>
> Very minor change in slow path, but why not ? ;)
>
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---

Acked-by: Neal Cardwell <ncardwell@...gle.com>

neal