netdev - Re: Trouble Shooting ipsec

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Message-ID: <20110208213718.GB7450@hmsreliant.think-freely.org>
Date:	Tue, 8 Feb 2011 16:37:18 -0500
From:	Neil Horman <nhorman@...driver.com>
To:	David Miller <davem@...emloft.net>
Cc:	sclark46@...thlink.net, netdev@...r.kernel.org
Subject: Re: Trouble Shooting ipsec

On Tue, Feb 08, 2011 at 11:37:08AM -0800, David Miller wrote:
> From: Stephen Clark <sclark46@...thlink.net>
> Date: Tue, 08 Feb 2011 14:33:17 -0500
> 
> > I'll continue investigating. It just so frustrating when the ipsec
> > packets just get dropped and you have no idea why. I wish there were
> > some hooks in the kernel so you could at least get some debug
> > information about what is happening.
> 
> There is a tracepoint (which you can monitor using perf) which tracks
> all packet drops.
> 
+1, you can also use dropwatch to monitor that tracepoint if the drop volume is
high.  
Neil

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