netdev - Re: Checksum offload queries

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 9 Dec 2015 23:44:45 +0100
From:	Thomas Graf <tgraf@...g.ch>
To:	Tom Herbert <tom@...bertland.com>
Cc:	Edward Cree <ecree@...arflare.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: Checksum offload queries

On 12/09/15 at 02:42pm, Tom Herbert wrote:
> csum_start and csum_offset together occupy 32 bits. As demonstrated in
> VXLAN RCO we can compress csum_start/csum_offset down to 8 bits which
> means if necessary we could get up to four pairs in an sk_buff without
> increasing its size. If you need more that four checksums to be
> offloaded in single packet then I doubt getting checksum offload to
> work is going to be your biggest problem.

Fair point. I wouldn't suggest even creating it without huge demand
first. There should be as many incentives as possible to move or stay
away from such horrible architectures.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html