From: "David S. Miller" <davem@redhat.com>
To: alan@lxorguk.ukuu.org.uk
Cc: greearb@candelatech.com, linux-kernel@vger.kernel.org
Subject: Re: packet re-ordering on SMP machines.
Date: Sun, 25 Aug 2002 15:49:24 -0700 (PDT) [thread overview]
Message-ID: <20020825.154924.104033788.davem@redhat.com> (raw)
In-Reply-To: <1030286473.16651.7.camel@irongate.swansea.linux.org.uk>
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: 25 Aug 2002 15:41:13 +0100
> 3) If answer to 2 is no, would you all be interested in a patch that
> did allow strict ordering (if indeed I can figure out how to write one)?
You should never need it. Ethernet, hubs, switches, routers, internet
backbones etc will all cause packet re-ordering. You should also expect
the percentage of re-ordered frames on the net to rise and rise.
But to be honest, NAPI was meant to dramatically reduce the "SMP
specific" causes of packet reordering. When a driver does use NAPI,
the reordering due to SMP goes way down.
next prev parent reply other threads:[~2002-08-25 22:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-25 7:18 Ben Greear
2002-08-25 7:07 ` David S. Miller
2002-08-25 14:41 ` Alan Cox
2002-08-25 17:00 ` Ben Greear
2002-08-25 20:44 ` Alan Cox
2002-08-25 22:49 ` David S. Miller [this message]
2002-08-25 8:01 Manfred Spraul
2002-08-25 15:56 jamal
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