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

To: ak@xxxxxx, feldy@xxxxxxxx
Subject: Re: [Fwd: Re: possible bug x86 2.4.2 SMP in IP receive stack]
From: Bob Felderman <feldy@xxxxxxxx>
Date: Fri, 9 Mar 2001 11:00:47 -0800 (PST)
Cc: andrewm@xxxxxxxxxx, davem@xxxxxxxxxx, kuznet@xxxxxxxxxxxxx, netdev@xxxxxxxxxxx, pp@xxxxxxxxxxxxxx
Sender: owner-netdev@xxxxxxxxxxx
=> On Thu, Mar 08, 2001 at 07:56:43PM +0100, Bob Felderman wrote:
=> > I think the culprit here is the packet receive errors from 
=> > UDP. These are socket overflows I think. I'm trying to 
=> > track it down. When I used DaveM's zero-copy patches on
=> > a linux-2.4.0 kernel, most, if not all, of these
=> > packet receive errors went away. 
=> 
=> So does it help when you increase the socket receive buffer of the receiver ?
=> 
=> (via /proc/sys/net/core/rmem_{default,max}) 

I don't see a big change here either. Once I'm up to 512KB-1meg
or so, I don't see much improvement.

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