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Re: [Fwd: Re: possible bug x86 2.4.2 SMP in IP receive stack]

To: davem@xxxxxxxxxx (David S. Miller)
Subject: Re: [Fwd: Re: possible bug x86 2.4.2 SMP in IP receive stack]
From: kuznet@xxxxxxxxxxxxx
Date: Fri, 9 Mar 2001 23:35:29 +0300 (MSK)
Cc: hadi@xxxxxxxxxx, feldy@xxxxxxxx, ak@xxxxxx, andrewm@xxxxxxxxxx, netdev@xxxxxxxxxxx, pp@xxxxxxxxxxxxxx
In-reply-to: <15017.14060.373448.198308@xxxxxxxxxxxxxxx> from "David S. Miller" at Mar 9, 1 12:02:52 pm
Sender: owner-netdev@xxxxxxxxxxx
Hello!

> He's using fragmented UDP packets, so the lazy receive defrag stuff
> (ie. 2 copies turn into 1) work wonders.

_No_ copy on softirq. It is more important.

It is the reason why all the tricks with backlog are not essential.

Alexey

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