netdev - Re: tcp md5: one more crypto-sg-on-the-stack instance

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Message-ID: <1466828771.6850.124.camel@edumazet-glaptop3.roam.corp.google.com>
Date:	Sat, 25 Jun 2016 06:26:11 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Andy Lutomirski <luto@...capital.net>
Cc:	Herbert Xu <herbert@...dor.apana.org.au>,
	Network Development <netdev@...r.kernel.org>
Subject: Re: tcp md5: one more crypto-sg-on-the-stack instance

On Sat, 2016-06-25 at 06:11 +0200, Eric Dumazet wrote:

> Simply extend tcp_md5sig_pool to contain a copy of the TCP headers ?
> 
> At most 40 bytes of extra per cpu storage is not a big problem.
> 

Correction : This is exactly 20 bytes for tcphdr, not 40.