netdev - Re: [net-next-2.6 PATCH 2/5] ixgbe: drop support for UDP in RSS hash generation

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:	Mon, 19 Jul 2010 23:39:47 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	billfink@...dspring.com, jeffrey.t.kirsher@...el.com,
	netdev@...r.kernel.org, gospo@...hat.com, bphilips@...ell.com,
	alexander.h.duyck@...el.com, donald.c.skidmore@...el.com
Subject: Re: [net-next-2.6 PATCH 2/5] ixgbe: drop support for UDP in RSS
 hash generation

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 20 Jul 2010 08:30:00 +0200

> By nature, UDP flows are subject to out of order issues, so what is this
> patch tries to avoid ?

UDP being subject to out-of-order issues really doesn't matter one
bit.

We should never, _knowingly_ create out-of-order packets in our
networking stack.  And this is regardless of protocol.

If there is no way to make ixgbe respect in-order packet delivery for
UDP frames vis-a-vis fragmented frames, we must disable RX flow
spreading for UDP.
--
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