netdev - Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is not successful

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Message-Id: <20100603005619.48138462.billfink@mindspring.com>
Date:	Thu, 3 Jun 2010 00:56:19 -0400
From:	Bill Fink <billfink@...dspring.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>, cl@...ux-foundation.org,
	netdev@...r.kernel.org, shemminger@...tta.com
Subject: Re: [PATCH] IP: Increment INADDRERRORS if routing for a packet is
 not successful

On Thu, 03 Jun 2010, Eric Dumazet wrote:

> Le mercredi 02 juin 2010 à 23:50 -0400, Bill Fink a écrit :
> > On Wed, 02 Jun 2010, David Miller wrote:
> > 
> > > Just in case people are really so clueless as to be unable to figure
> > > this out:
> > > 
> > > echo 1 >/sys/kernel/debug/tracing/events/skb/kfree_skb/enable
> > > ...do some stuff...
> > > cat /sys/kernel/debug/tracing/trace
> > > 
> > > You can even trace it using 'perf' by passing "skb:kfree_skb"
> > > as the event specifier.
> > 
> > Could someone remind me where to get documentation for obtaining
> > and using perf.
> > 
> 
> Its sources are included in kernel tree
> 
> cd tools/perf
> make
> ./perf --help

Thanks.  That seems easy enough.  From some gitweb digging, it
appears perf first appeared in 2.6.31 kernels, so I'm going to
have to do a kernel upgrade from our current 2.6.30.10 kernels.

For others, I also ran across a perf wiki page at:

	https://perf.wiki.kernel.org/index.php/Main_Page

						-Bill
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