From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH v2] ipv4 : igmp : optimize timer modify logic in
 igmp_mod_timer()
Date: Wed, 23 Nov 2011 17:28:14 -0500 (EST)
Message-ID: <20111123.172814.1626722266908002386.davem@davemloft.net>
References: <1322066322-4782-1-git-send-email-mypopydev@gmail.com>
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Cc: eric.dumazet@gmail.com, netdev@vger.kernel.org
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From: Jun Zhao <mypopydev@gmail.com>
Date: Thu, 24 Nov 2011 00:38:42 +0800

> When timer is pending and expires less-than-or-equal-to new delay,
> we need not used del_timer()/add_timer().
> 
> Signed-off-by: Jun Zhao <mypopydev@gmail.com>

You did not answer Eric's question, why are you optimizing this
less-used code path?