linux-kernel - Re: [PATCH] tcp: md5 signature check scaling

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Message-ID: <AANLkTinbfZX3Lmj9omq6a+QNErjfRFBQGi0Kr9osud5O@mail.gmail.com>
Date:	Wed, 27 Oct 2010 17:18:42 +0400
From:	Dmitry Popov <dp@...hloadlab.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	William.Allen.Simpson@...il.com,
	Andreas Petlund <apetlund@...ula.no>,
	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>,
	Alexey Kuznetsov <kuznet@....inr.ac.ru>,
	"Pekka Savola (ipv6)" <pekkas@...core.fi>,
	James Morris <jmorris@...ei.org>,
	Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
	Patrick McHardy <kaber@...sh.net>,
	Stephen Hemminger <shemminger@...tta.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Gilad Ben-Yossef <gilad@...efidence.com>,
	Yony Amit <yony@...sleep.com>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org, Artyom Gavrichenkov <ag@...hloadlab.com>
Subject: Re: [PATCH] tcp: md5 signature check scaling

On Wed, Oct 27, 2010 at 5:00 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
>
> This is a huge patch :(
>
> Reading changelog, I dont understand what you did, and why you did this.
>
> You want to avoid taking the socket lock ? But we need to take it anyway
> to process packets.

Hi.

Well, I removed the dependence on socket lock from md5* functions. Yes
we need to take it to process packets, but sockets in LISTEN state may
process them without socket lock(patch coming soon). And I find md5
signature check scaling interesting even without LISTEN state scaling
patch.

Regards,
Dmitry.
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