netdev - Re: UDP multicast packet loss not reported if TX ring overrun?

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: <1251230161.24767.57.camel@Joe-Laptop.home>
Date:	Tue, 25 Aug 2009 12:56:01 -0700
From:	Joe Perches <joe@...ches.com>
To:	Christoph Lameter <cl@...ux-foundation.org>
Cc:	David Stevens <dlstevens@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org,
	netdev-owner@...r.kernel.org, niv@...ux.vnet.ibm.com,
	sri@...ux.vnet.ibm.com
Subject: Re: UDP multicast packet loss not reported if TX ring overrun?

On Tue, 2009-08-25 at 15:15 -0400, Christoph Lameter wrote:
> On Tue, 25 Aug 2009, David Stevens wrote:
> > Christoph Lameter <cl@...ux-foundation.org> wrote on 08/25/2009 06:48:24
> > AM:
> > > On Mon, 24 Aug 2009, Sridhar Samudrala wrote:
> > > > If we count these drops as qdisc drops, should we also count them as
> > IP OUTDISCARDS?
> > > Yes.
> > Actually, no. (!)
> > IP_OUTDISCARDS should count the packets IP dropped, not
> > anything dropped at a lower layer (which, in general, it
> > is not aware of). If you count these in multiple layers,
> > then you don't really know who dropped it.
> They need to be accounted at the qdisc level though.

It's probably useful to be able to know when packets
and payloads are dropped.  It may not be necessary though.
It's probably not a fundamental.

Chariot, LANforge and apps like it might care, but most all
other apps might not care at all.

Maybe these should be allowed with a CONFIG.


--
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