Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-12 Thread Paul E. McKenney
On Mon, Sep 12, 2016 at 11:13:45AM -0400, Rich Felker wrote: > On Sat, Sep 10, 2016 at 03:19:38AM -0700, Paul E. McKenney wrote: > > On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > > > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > > > On Tue, Aug 02, 2016 at

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-12 Thread Paul E. McKenney
On Mon, Sep 12, 2016 at 11:13:45AM -0400, Rich Felker wrote: > On Sat, Sep 10, 2016 at 03:19:38AM -0700, Paul E. McKenney wrote: > > On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > > > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > > > On Tue, Aug 02, 2016 at

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-12 Thread Rich Felker
On Sat, Sep 10, 2016 at 03:19:38AM -0700, Paul E. McKenney wrote: > On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > > > On Tue, Aug 02,

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-12 Thread Rich Felker
On Sat, Sep 10, 2016 at 03:19:38AM -0700, Paul E. McKenney wrote: > On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > > > On Tue, Aug 02,

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-10 Thread Paul E. McKenney
On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > > > On Tue, Aug 02, 2016 at

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-10 Thread Paul E. McKenney
On Thu, Sep 08, 2016 at 06:16:53PM -0400, Rich Felker wrote: > On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > > > On Tue, Aug 02, 2016 at

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-08 Thread Rich Felker
On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > [ . . . ] > > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-09-08 Thread Rich Felker
On Wed, Aug 03, 2016 at 09:16:31AM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > [ . . . ] > > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-04 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: [ . . . ] > > > Does the problem reproduces easily? > > > > Yes, it happens right after boot and

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-04 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 01:45:04PM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: [ . . . ] > > > Does the problem reproduces easily? > > > > Yes, it happens right after boot and

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 03:20:37PM -0400, Rich Felker wrote: > On Tue, Aug 02, 2016 at 11:16:36AM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > > > Hi Paul, > > > > > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 03:20:37PM -0400, Rich Felker wrote: > On Tue, Aug 02, 2016 at 11:16:36AM -0700, Paul E. McKenney wrote: > > On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > > > Hi Paul, > > > > > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > Hi Paul, > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > stall messages since rebasing my tree on Linus's in-progress merge for > 4.8, as part of updating both the arch/sh tree and drivers going > upstream

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > Hi Paul, > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > stall messages since rebasing my tree on Linus's in-progress merge for > 4.8, as part of updating both the arch/sh tree and drivers going > upstream

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > > > > The system I'm testing on is an SMP configuration of the J2 SoC on > > > > > FPGA (see: j-core.org), and the SMP support and timer driver (most > > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Paul E. McKenney
On Tue, Aug 02, 2016 at 04:32:17PM -0400, Rich Felker wrote: > On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > > > > The system I'm testing on is an SMP configuration of the J2 SoC on > > > > > FPGA (see: j-core.org), and the SMP support and timer driver (most > > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > > > The system I'm testing on is an SMP configuration of the J2 SoC on > > > > FPGA (see: j-core.org), and the SMP support and timer driver (most > > > > relevant, imo) are new, but never exhibited this problem on 4.6 or > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
On Tue, Aug 02, 2016 at 12:48:02PM -0700, Paul E. McKenney wrote: > > > > The system I'm testing on is an SMP configuration of the J2 SoC on > > > > FPGA (see: j-core.org), and the SMP support and timer driver (most > > > > relevant, imo) are new, but never exhibited this problem on 4.6 or > > > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
On Tue, Aug 02, 2016 at 11:16:36AM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > > Hi Paul, > > > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > > stall messages since rebasing my tree on Linus's in-progress merge for > >

Re: rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
On Tue, Aug 02, 2016 at 11:16:36AM -0700, Paul E. McKenney wrote: > On Tue, Aug 02, 2016 at 01:04:15PM -0400, Rich Felker wrote: > > Hi Paul, > > > > As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu > > stall messages since rebasing my tree on Linus's in-progress merge for > >

rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
Hi Paul, As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu stall messages since rebasing my tree on Linus's in-progress merge for 4.8, as part of updating both the arch/sh tree and drivers going upstream through other maintainers to account for changes made to infrastructure they

rcu_sched stalls in idle task introduced in pre-4.8?

2016-08-02 Thread Rich Felker
Hi Paul, As I mentioned on Twitter, I'm experiencing (otherwise benign) rcu stall messages since rebasing my tree on Linus's in-progress merge for 4.8, as part of updating both the arch/sh tree and drivers going upstream through other maintainers to account for changes made to infrastructure they