Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Frederic Weisbecker
2013/1/5 Paul E. McKenney : > On Sat, Jan 05, 2013 at 06:21:01PM +0100, Frederic Weisbecker wrote: >> Hi Paul, >> >> 2013/1/5 Paul E. McKenney : >> > From: Paul Gortmaker >> > >> > The wait_event() at the head of the rcu_nocb_kthread() can result in >> > soft-lockup complaints if the CPU in

Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Paul E. McKenney
On Sat, Jan 05, 2013 at 06:21:01PM +0100, Frederic Weisbecker wrote: > Hi Paul, > > 2013/1/5 Paul E. McKenney : > > From: Paul Gortmaker > > > > The wait_event() at the head of the rcu_nocb_kthread() can result in > > soft-lockup complaints if the CPU in question does not register RCU > >

Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Frederic Weisbecker
Hi Paul, 2013/1/5 Paul E. McKenney : > From: Paul Gortmaker > > The wait_event() at the head of the rcu_nocb_kthread() can result in > soft-lockup complaints if the CPU in question does not register RCU > callbacks for an extended period. This commit therefore changes > the wait_event() to a

[PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Paul E. McKenney
From: Paul Gortmaker The wait_event() at the head of the rcu_nocb_kthread() can result in soft-lockup complaints if the CPU in question does not register RCU callbacks for an extended period. This commit therefore changes the wait_event() to a wait_event_interruptible(). Reported-by: Frederic

[PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Paul E. McKenney
From: Paul Gortmaker paul.gortma...@windriver.com The wait_event() at the head of the rcu_nocb_kthread() can result in soft-lockup complaints if the CPU in question does not register RCU callbacks for an extended period. This commit therefore changes the wait_event() to a

Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Frederic Weisbecker
Hi Paul, 2013/1/5 Paul E. McKenney paul...@linux.vnet.ibm.com: From: Paul Gortmaker paul.gortma...@windriver.com The wait_event() at the head of the rcu_nocb_kthread() can result in soft-lockup complaints if the CPU in question does not register RCU callbacks for an extended period. This

Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Paul E. McKenney
On Sat, Jan 05, 2013 at 06:21:01PM +0100, Frederic Weisbecker wrote: Hi Paul, 2013/1/5 Paul E. McKenney paul...@linux.vnet.ibm.com: From: Paul Gortmaker paul.gortma...@windriver.com The wait_event() at the head of the rcu_nocb_kthread() can result in soft-lockup complaints if the CPU

Re: [PATCH tip/core/urgent 1/2] rcu: Prevent soft-lockup complaints about no-CBs CPUs

2013-01-05 Thread Frederic Weisbecker
2013/1/5 Paul E. McKenney paul...@linux.vnet.ibm.com: On Sat, Jan 05, 2013 at 06:21:01PM +0100, Frederic Weisbecker wrote: Hi Paul, 2013/1/5 Paul E. McKenney paul...@linux.vnet.ibm.com: From: Paul Gortmaker paul.gortma...@windriver.com The wait_event() at the head of the