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Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs for last non-dynticked CPU

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From: Ingo Molnar
Subject: Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs for last non-dynticked CPU
Date: Tuesday, March 16, 2010 - 4:00 am

* tip-bot for Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:


hm, i started seeing boot crashes on a testbox, and bisected it back to:

| 622ea685f1fafdf84d612440535c84341f0860b8 is the first bad commit
| commit 622ea685f1fafdf84d612440535c84341f0860b8
| Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| Date:   Sat Feb 27 14:53:07 2010 -0800
|
|     rcu: Fix holdoff for accelerated GPs for last non-dynticked CPU

Config attached. I have no bootlog, unfortunately.

Unfortunately #2: reverting the commit still causes a crash - so it could be a 
combination bug and a mis-bisection ...

(the bisection itself was an automated run)

Any ideas?
  
	Ingo
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Messages in current thread:
[PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST_NO_ ..., Paul E. McKenney, (Sat Feb 27, 3:52 pm)
[PATCH tip/core/rcu 1/2] rcu: fix holdoff for accelerated ..., Paul E. McKenney, (Sat Feb 27, 3:53 pm)
[PATCH tip/core/rcu 2/2] rcu: make task_subsys_state() RCU ..., Paul E. McKenney, (Sat Feb 27, 3:53 pm)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Ingo Molnar, (Sun Feb 28, 1:55 am)
[tip:core/rcu] rcu: Fix holdoff for accelerated GPs for la ..., tip-bot for Paul E. ..., (Sun Feb 28, 1:59 am)
[tip:core/rcu] rcu: Make task_subsys_state() RCU-lockdep c ..., tip-bot for Paul E. ..., (Sun Feb 28, 1:59 am)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Paul E. McKenney, (Sun Feb 28, 9:32 am)
[tip:core/rcu] sched, rcu: Fix rcu_dereference() for RCU-l ..., tip-bot for Paul E. ..., (Mon Mar 1, 1:33 am)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Ingo Molnar, (Mon Mar 1, 5:10 am)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Paul E. McKenney, (Mon Mar 1, 9:08 am)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Peter Zijlstra, (Mon Mar 1, 10:58 am)
Re: [PATCH tip/core/rcu 0/2] more lockdep-RCU and RCU_FAST ..., Paul E. McKenney, (Mon Mar 1, 11:50 am)
Re: [tip:core/rcu] rcu: Make task_subsys_state() RCU-lockd ..., Paul Menage, (Mon Mar 1, 12:47 pm)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Tue Mar 16, 4:00 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Tue Mar 16, 4:03 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Tue Mar 16, 4:51 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Tue Mar 16, 5:15 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Paul E. McKenney, (Tue Mar 16, 6:30 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Wed Mar 17, 10:53 am)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Paul E. McKenney, (Wed Mar 17, 12:22 pm)
Re: [tip:core/rcu] rcu: Fix holdoff for accelerated GPs fo ..., Ingo Molnar, (Wed Mar 17, 12:35 pm)