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SubjectRe: packet re-ordering on SMP machines.
   From: Alan Cox <>
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.
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