netdev - Re: [PATCH] NIU support for skb->rxhash

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]

Message-ID: <20100422092120.603e83b8@nehalam>
Date:	Thu, 22 Apr 2010 09:21:20 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] NIU support for skb->rxhash

On Thu, 22 Apr 2010 04:21:57 -0700 (PDT)
David Miller <davem@...emloft.net> wrote:

> 
> But it turns out using it is largely pointless since the only way to
> get the hash value(s) is through a structure which is prepended to the
> packet data (so we take a cache miss on the packet data anyways)
> instead of being able to fetch it out of the RX descriptors :-/
> 
> If anyone out there is trying to design sane hardware, please put the
> following into your RX descriptors:
> 
> 1) ethernet protocol type (u16)
> 2) a flag bit indicating if the packet destination matched one
>    of the programmed unicast MAC addresses
> 3) a flag bit indicating "multicast"
> 4) a flag bit indicating "broadcast"
> 5) at least 32-bits of the computed flow hash (u32)
> 
> kthx, bye!
> 
> Signed-off-by: David S. Miller <davem@...emloft.net>

Could you make configurable via ethtool like I did for sky2.

P.s: where is that patch seems lost in patchwork
--
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