netdev - Re: VLAN GARP triggers a lot of timers if linux compiled with VLAN_8021Q

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Message-ID: <4CA3056B.6010901@trash.net>
Date:	Wed, 29 Sep 2010 11:22:51 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	didier <did447@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: VLAN GARP triggers a lot of timers if linux compiled with VLAN_8021Q_GVRP

Am 29.09.2010 02:35, schrieb didier:
> Hi,
> 
> In my understanding GARP is using a periodic timer but in net/802/garp.c:
> 
> garp_join_timer_arm()
> 
> delay = (u64)msecs_to_jiffies(garp_join_time)* net_random() >> 32;
> mod_timer(&app->join_timer, jiffies +delay)
> 
> Isn't this stuff triggering a *lot* of events?

Yeah, something around 5-10 timers per second IIRC. There was an RFC
patch a while ago to only schedule the timer on-demand, I'll see
whether I can find it again.
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