netdev - Fw: [Bugme-new] [Bug 8085] New: performance drop in 2.6.20

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Date:	Mon, 26 Feb 2007 07:20:53 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	netdev@...r.kernel.org
Cc:	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, a1bert@...as.cz
Subject: Fw: [Bugme-new] [Bug 8085] New: performance drop in 2.6.20


ooh.

Begin forwarded message:

Date: Mon, 26 Feb 2007 07:10:48 -0800
From: bugme-daemon@...zilla.kernel.org
To: bugme-new@...ts.osdl.org
Subject: [Bugme-new] [Bug 8085] New: performance drop in 2.6.20


http://bugzilla.kernel.org/show_bug.cgi?id=8085

           Summary: performance drop in 2.6.20
    Kernel Version: 2.6.20
            Status: NEW
          Severity: normal
             Owner: shemminger@...l.org
         Submitter: a1bert@...as.cz


Most recent kernel where this bug did *NOT* occur: 2.6.19.5
Distribution: slackware based
Hardware Environment: Xeon + e1000
Software Environment: gcc 3.3.x
Problem Description: noticeable (10-15%) routing and bridging (possibly 
overall) performance drop between 2.6.19.5 - 2.6.20 (2.6.20.1 2.6.21-rc1 too) 
same configs

we are experiencing performance drop on our rather busy(>150kpps >700Mbps in 
one direction) bridge with ebtables and routers (210k routes, >30kpps duplex). 
It's not e1000 issue.

Steps to reproduce:

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