linux-kernel - RE: rcu_preempt self-detected stall on CPU from 4.5-rc3, since 3.17

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 23 Mar 2016 18:25:50 +0000
From:	"Chatre, Reinette" <reinette.chatre@...el.com>
To:	"paulmck@...ux.vnet.ibm.com" <paulmck@...ux.vnet.ibm.com>
CC:	Jacob Pan <jacob.jun.pan@...ux.intel.com>,
	Josh Triplett <josh@...htriplett.org>,
	Ross Green <rgkernel@...il.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	John Stultz <john.stultz@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	"Lai Jiangshan" <jiangshanlai@...il.com>,
	"dipankar@...ibm.com" <dipankar@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	rostedt <rostedt@...dmis.org>,
	David Howells <dhowells@...hat.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Darren Hart <dvhart@...ux.intel.com>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Oleg Nesterov <oleg@...hat.com>,
	pranith kumar <bobby.prani@...il.com>
Subject: RE: rcu_preempt self-detected stall on CPU from 4.5-rc3, since 3.17

Hi Paul,

On 2016-03-23, Paul E. McKenney wrote:
> Please boot with the following parameters:
> 
> 	rcu_tree.rcu_kick_kthreads ftrace
> trace_event=sched_waking,sched_wakeup,sched_wake_idle_without_ipi
> 
> Or was this run with tracing?  If so, less than three hours isn't too bad.

This was with tracing enabled, only missing the crucial rcu_tree.rcu_kick_kthreads

Reinette