linux-kernel - Re: BUG: rcu_sched detected stalls on CPUs

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Message-ID: <20170120101912.00498a6e@gandalf.local.home>
Date:   Fri, 20 Jan 2017 10:19:12 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     mitko@...-bg.com
Cc:     "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
        Josh Triplett <josh@...htriplett.org>,
        linux-kernel@...r.kernel.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>
Subject: Re: BUG: rcu_sched detected stalls on CPUs

On Fri, 20 Jan 2017 10:43:50 +0200
mitko@...-bg.com wrote:

> [1.] One line summary of the problem:
> 
> rcu_sched detected stalls on CPUs and few minutes server not respond.

Is this reproducible? Or was this a one time ordeal?

> 
> [2.] Full description of the problem/report:
> 
> Load of my server (postgres database) isnt big less then 0.50 and when 
> error occured rcu_sched detected stalls on CPUs
> server freeze and nothing is work for 3-5 minute.
> No network, no video signal, no keyboard, no mouse. Nothing is worked. 
> After these few minutes everything continue normal.
> This usual is happend once per day. When I check in google find a lots 
> of ppl complain of this error, but no solution.
> Do any one know can help me to resolve it ? I spoke with few friends and 
> they trying to convince me the problem is in CPU.
> I did not believe after a 3 years working CPU suddenly stop working 
> correctly, but I might be wrong.
> 
> [3.] Keywords (i.e., modules, networking, kernel):
> 
> kernel
> 
> [4.] Kernel information
> [4.1.] Kernel version (from /proc/version):
> 
> Linux version 4.4.38 (root@...e64) (gcc version 5.4.0 (GCC) ) #2 SMP Sun 
> Dec 11 16:11:02 CST 2016
> 

Have you tried a newer version of the kernel?

-- Steve