netdev - Re: [PATCH net-next] tipc: ratelimit network event traces

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Message-Id: <20150119.194631.158476804095735240.davem@davemloft.net>
Date:	Mon, 19 Jan 2015 19:46:31 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	erik.hugne@...csson.com
Cc:	richard.alpe@...csson.com, ying.xue@...driver.com,
	jon.maloy@...csson.com, netdev@...r.kernel.org,
	tipc-discussion@...ts.sourceforge.net
Subject: Re: [PATCH net-next] tipc: ratelimit network event traces

From: <erik.hugne@...csson.com>
Date: Mon, 19 Jan 2015 10:02:44 +0100

> From: Erik Hugne <erik.hugne@...csson.com>
> 
> If a large number of namespaces is spawned on a node and TIPC is
> enabled in each of these, the excessive printk tracing of network
> events will cause the system to grind down to a near halt.
> We fix this by adding ratelimiting to the info/warning logs
> regarding link state and node availability.
> 
> Signed-off-by: Erik Hugne <erik.hugne@...csson.com>
> Reviewed-by: Ying Xue <ying.xue@...driver.com>

Really these various state transition messages that are enabled
by default really should not be.

If you want to watch for every event like this, listen on a
netlink socket or set some debugging level param to some non-
default value.
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