netdev - Re: [PATCH net-next 1/2] tipc: fix excessive network event logging

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Message-ID: <20150123064430.GA26059@haze>
Date:	Fri, 23 Jan 2015 07:44:30 +0100
From:	Erik Hugne <erik.hugne@...csson.com>
To:	Joe Perches <joe@...ches.com>
CC:	<richard.alpe@...csson.com>, <netdev@...r.kernel.org>,
	<jon.maloy@...csson.com>, <ying.xue@...driver.com>,
	<tipc-discussion@...ts.sourceforge.net>
Subject: Re: [PATCH net-next 1/2] tipc: fix excessive network event logging

On Thu, Jan 22, 2015 at 09:24:47AM -0800, Joe Perches wrote:
> On Thu, 2015-01-22 at 17:10 +0100, erik.hugne@...csson.com wrote:
> > 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.
> > The traces are still of debug value, so instead of removing them
> > completely we fix it by changing the link state and node availability
> > logging debug traces.
> 
> Maybe some of these should be net_<level>_ratelimited(fmt, ...)

We proposed that initially, but changed all to pr_debug after David's comment:
http://www.spinics.net/lists/netdev/msg312902.html
The topology information (links going up/down) can be accessed
both via netlink ('tipc link list' command) and the topology server
via a subscription API.

//E
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