From: Jesper Dangaard Brouer <brouer@redhat.com>
To: linux-sctp@vger.kernel.org
Subject: Re: [PATCH ipvs 2/2] net: ipvs: sctp: do not recalc sctp checksum when not needed
Date: Fri, 25 Oct 2013 09:48:13 +0000 [thread overview]
Message-ID: <20131025114813.6a227df3@redhat.com> (raw)
In-Reply-To: <8390127344501c35ed3c23f3690b8a671d353870.1382689350.git.dborkman@redhat.com>
On Fri, 25 Oct 2013 11:05:05 +0200
Daniel Borkmann <dborkman@redhat.com> wrote:
> Unlike UDP or TCP, we do not take the pseudo-header into account
> in SCTP checksums [1]. So in case port mapping is the very same, we
> do not need to recalculate the whole SCTP checksum in software, which
> is expensive.
>
> Also, similarly as in IPVS/TCP, take into account when a private
> helper mangled the packet. In that case, we also need to recalculate
> the checksum even if ports might be same.
>
> [1] http://tools.ietf.org/html/rfc4960#section-6.8
>
> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
> ---
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Thanks Daniel, this will hopefully increase SCTP performance as we
avoid recalculating the checksum when not necessary :-)
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
WARNING: multiple messages have this Message-ID (diff)
From: Jesper Dangaard Brouer <brouer@redhat.com>
To: Daniel Borkmann <dborkman@redhat.com>
Cc: horms@verge.net.au, lvs-devel@vger.kernel.org,
linux-sctp@vger.kernel.org
Subject: Re: [PATCH ipvs 2/2] net: ipvs: sctp: do not recalc sctp checksum when not needed
Date: Fri, 25 Oct 2013 11:48:13 +0200 [thread overview]
Message-ID: <20131025114813.6a227df3@redhat.com> (raw)
In-Reply-To: <8390127344501c35ed3c23f3690b8a671d353870.1382689350.git.dborkman@redhat.com>
On Fri, 25 Oct 2013 11:05:05 +0200
Daniel Borkmann <dborkman@redhat.com> wrote:
> Unlike UDP or TCP, we do not take the pseudo-header into account
> in SCTP checksums [1]. So in case port mapping is the very same, we
> do not need to recalculate the whole SCTP checksum in software, which
> is expensive.
>
> Also, similarly as in IPVS/TCP, take into account when a private
> helper mangled the packet. In that case, we also need to recalculate
> the checksum even if ports might be same.
>
> [1] http://tools.ietf.org/html/rfc4960#section-6.8
>
> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
> ---
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Thanks Daniel, this will hopefully increase SCTP performance as we
avoid recalculating the checksum when not necessary :-)
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Sr. Network Kernel Developer at Red Hat
Author of http://www.iptv-analyzer.org
LinkedIn: http://www.linkedin.com/in/brouer
next prev parent reply other threads:[~2013-10-25 9:48 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-25 9:05 [PATCH ipvs 2/2] net: ipvs: sctp: do not recalc sctp checksum when not needed Daniel Borkmann
2013-10-25 9:05 ` Daniel Borkmann
2013-10-25 9:48 ` Jesper Dangaard Brouer [this message]
2013-10-25 9:48 ` Jesper Dangaard Brouer
2013-10-25 13:01 ` Neil Horman
2013-10-25 13:01 ` Neil Horman
2013-10-25 21:00 ` Julian Anastasov
2013-10-25 21:00 ` Julian Anastasov
2013-10-26 18:55 ` Daniel Borkmann
2013-10-26 18:55 ` Daniel Borkmann
2013-10-28 1:39 ` Simon Horman
2013-10-28 1:39 ` Simon Horman
2013-10-28 8:11 ` Daniel Borkmann
2013-10-28 8:11 ` Daniel Borkmann
2013-10-28 8:11 ` Julian Anastasov
2013-10-28 8:11 ` Julian Anastasov
2013-10-28 8:50 ` Simon Horman
2013-10-28 8:50 ` Simon Horman
2013-10-28 9:00 ` Julian Anastasov
2013-10-28 9:00 ` Julian Anastasov
2013-10-28 9:38 ` Simon Horman
2013-10-28 9:38 ` Simon Horman
-- strict thread matches above, loose matches on Subject: below --
2013-10-25 9:05 [PATCH ipvs 1/2] net: ipvs: sctp: add missing verdict assignments in sctp_conn_schedule Daniel Borkmann
2013-10-25 9:05 ` Daniel Borkmann
2013-10-25 9:39 ` Jesper Dangaard Brouer
2013-10-25 9:39 ` Jesper Dangaard Brouer
2013-10-25 9:55 ` Simon Horman
2013-10-25 9:55 ` Simon Horman
2013-10-25 10:03 ` Daniel Borkmann
2013-10-25 10:03 ` Daniel Borkmann
2013-10-25 12:59 ` Neil Horman
2013-10-25 12:59 ` Neil Horman
2013-10-25 21:05 ` Julian Anastasov
2013-10-25 21:05 ` Julian Anastasov
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