linux-kernel - [PATCH RFC] rcu: RCU CPU stall patches backported to 2.6.33-rc8

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Message-ID: <20100223014654.GA3404@linux.vnet.ibm.com>
Date:	Mon, 22 Feb 2010 17:46:54 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	tglx@...utronix.de, jkacur@...hat.com
Subject: [PATCH RFC] rcu: RCU CPU stall patches backported to 2.6.33-rc8

Hello!

This set backports a couple of RCU CPU stall detection patches from the
earlier series (http://lkml.org/lkml/2010/2/22/384) to 2.6.33-rc8 to
help track down some NMI issues.

These two patches fix an embarrassing deadlock that can affect
TREE_PREEMPT_RCU and add additional per-task output when tasks stall the
RCU grace period.

 b/kernel/rcutree.c        |    2 +
 b/kernel/rcutree.h        |    1 
 b/kernel/rcutree_plugin.h |    4 ---
 b/lib/Kconfig.debug       |   13 ++++++++++-
 kernel/rcutree.c          |    4 +++
 kernel/rcutree_plugin.h   |   52 ++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 71 insertions(+), 5 deletions(-)
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