On Thu, Dec 05, 2013 at 12:15:50PM -0500, Dave Jones wrote:
> On Thu, Dec 05, 2013 at 08:49:12AM -0800, Paul E. McKenney wrote:
>
> > But what workload are you running that causes this? The only way I
> > can think of to make this happen requires that you have at least one
> > CPU spending mor
On Thu, Dec 05, 2013 at 08:49:12AM -0800, Paul E. McKenney wrote:
> But what workload are you running that causes this? The only way I
> can think of to make this happen requires that you have at least one
> CPU spending more than 21 seconds running continuously in kernel mode.
> Is that wha
On Wed, Dec 04, 2013 at 08:22:06PM -0500, Dave Jones wrote:
> On Wed, Dec 04, 2013 at 04:16:14PM -0800, Paul E. McKenney wrote:
> > On Wed, Dec 04, 2013 at 06:28:38PM -0500, Dave Jones wrote:
> > > Paul,
> > > I'm seeing this happening more and more lately...
> > >
> > > [ 771.786462] INFO:
On Wed, Dec 04, 2013 at 06:36:05PM -0800, Joe Perches wrote:
> On Wed, 2013-12-04 at 18:18 -0800, Eric Dumazet wrote:
> > On Wed, 2013-12-04 at 16:16 -0800, Paul E. McKenney wrote:
> > > + ULONG_CMP_GE(ACCESS_ONCE(jiffies), rdp->rsp->jiffies_resched)) {
>
> perhaps time_before_eq
>
> > jiffie
On Wed, Dec 04, 2013 at 06:18:30PM -0800, Eric Dumazet wrote:
> On Wed, 2013-12-04 at 16:16 -0800, Paul E. McKenney wrote:
> > + if (rdp->rsp == rcu_state &&
> > + ULONG_CMP_GE(ACCESS_ONCE(jiffies), rdp->rsp->jiffies_resched)) {
> > + rdp->rsp->jiffies_resched += 5;
> > +
On Wed, Dec 04, 2013 at 08:22:06PM -0500, Dave Jones wrote:
> On Wed, Dec 04, 2013 at 04:16:14PM -0800, Paul E. McKenney wrote:
> > On Wed, Dec 04, 2013 at 06:28:38PM -0500, Dave Jones wrote:
> > > Paul,
> > > I'm seeing this happening more and more lately...
> > >
> > > [ 771.786462] INFO:
On Wed, 2013-12-04 at 18:18 -0800, Eric Dumazet wrote:
> On Wed, 2013-12-04 at 16:16 -0800, Paul E. McKenney wrote:
> > + ULONG_CMP_GE(ACCESS_ONCE(jiffies), rdp->rsp->jiffies_resched)) {
perhaps time_before_eq
> jiffies should not need ACCESS_ONCE(), right ?
>
> It is one of the few variab
On Wed, 2013-12-04 at 16:16 -0800, Paul E. McKenney wrote:
> + if (rdp->rsp == rcu_state &&
> + ULONG_CMP_GE(ACCESS_ONCE(jiffies), rdp->rsp->jiffies_resched)) {
> + rdp->rsp->jiffies_resched += 5;
> + resched_cpu(rdp->cpu);
> + }
> +
> return 0;
> }
j
On Wed, Dec 04, 2013 at 04:16:14PM -0800, Paul E. McKenney wrote:
> On Wed, Dec 04, 2013 at 06:28:38PM -0500, Dave Jones wrote:
> > Paul,
> > I'm seeing this happening more and more lately...
> >
> > [ 771.786462] INFO: rcu_preempt detected stalls on CPUs/tasks:
> > [ 771.786552] Tasks
On Wed, Dec 04, 2013 at 06:28:38PM -0500, Dave Jones wrote:
> Paul,
> I'm seeing this happening more and more lately...
>
> [ 771.786462] INFO: rcu_preempt detected stalls on CPUs/tasks:
> [ 771.786552]Tasks blocked on level-0 rcu_node (CPUs 0-3):
> [ 771.786574]Tasks blocked on
Paul,
I'm seeing this happening more and more lately...
[ 771.786462] INFO: rcu_preempt detected stalls on CPUs/tasks:
[ 771.786552] Tasks blocked on level-0 rcu_node (CPUs 0-3):
[ 771.786574] Tasks blocked on level-0 rcu_node (CPUs 0-3):
[ 771.786595] (detected by 0, t=6502 jiffies, g=2061
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