netdev - Re: [PATCH resend nf-next] netfilter: xt_CT: optimize XT_CT

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Message-ID: <20130523105404.GB22507@localhost>
Date:	Thu, 23 May 2013 12:54:04 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev <netdev@...r.kernel.org>, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH resend nf-next] netfilter: xt_CT: optimize XT_CT_NOTRACK

On Wed, May 22, 2013 at 02:10:57PM -0700, Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@...gle.com>
> 
> The percpu untracked ct are not currently used for XT_CT_NOTRACK.
> 
> xt_ct_tg_check()/xt_ct_target() provides a single ct.
> 
> Thats not optimal as the ct->ct_general.use cache line will bounce among
> cpus.
> 
> Use the intended [1] thing : xt_ct_target() should select the percpu
> object.
> 
> [1] Refs :
> commit 5bfddbd46a95c97 ("netfilter: nf_conntrack: IPS_UNTRACKED bit")
> commit b3c5163fe0193a7 ("netfilter: nf_conntrack: per_cpu untracking")

Applied, thanks Eric.
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