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Date: Fri, 29 Sep 2006 16:21:55 -0500
From: Craig Boston <craig@feniz.gank.org>
To: David G Lawrence <dg@dglawrence.com>
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Cc: freebsd-stable@freebsd.org, Oliver Brandmueller <ob@e-Gitt.NET>,
	John Baldwin <jhb@freebsd.org>
Subject: Re: 6.2 SHOWSTOPPER - em completely unusable on 6.2
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Doesn't seem to have any effect for me (other than high sys% times).
qemu is really good at provoking my em0 to timeout.

On Fri, Sep 29, 2006 at 12:27:41AM -0700, David G Lawrence wrote:
>    Attached is a simple user program that will immediately cause pretty much
> all of the network drivers (at least the ones I own) to stop working and
> get watchdog timeouts.
> 
> WARNING: This program will kill the network on your 6.x server. Do not run 
> this on a production machine unless you are on the console and can ctrl-C
> it!
> 
> -DG
> 
> David G. Lawrence
> President
> Download Technologies, Inc. - http://www.downloadtech.com - (866) 399 8500
> The FreeBSD Project - http://www.freebsd.org
> Pave the road of life with opportunities.

> #include <sys/poll.h>
> 
> main()
> {
> 	struct pollfd pfd;
> 
> 	pfd.fd = 1;
> 	pfd.events = POLLOUT;
> 	pfd.revents = 0;
> 
> 	while (1) {
> 		if (poll(&pfd, 1 /* stdout */, -1) < 0)
> 			break;
> 	}
> }

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