Re: Alleged fix for writer stall on -rcu branch dev

2019-04-23 Thread Paul E. McKenney
On Tue, Apr 23, 2019 at 05:25:00PM +0200, Sebastian Andrzej Siewior wrote: > On 2019-04-15 13:04:03 [+0200], To Paul E. McKenney wrote: > > > > good so nothing important so far. I hope the box gets to TREE08 soon. > > test completed. Nothing new. That took some time! Thank you for running it!

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-23 Thread Sebastian Andrzej Siewior
On 2019-04-15 13:04:03 [+0200], To Paul E. McKenney wrote: > > good so nothing important so far. I hope the box gets to TREE08 soon. test completed. Nothing new. > > > > Thanx, Paul > Sebastian

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-16 Thread Sebastian Andrzej Siewior
On 2019-04-15 15:26:52 [-0700], Paul E. McKenney wrote: > I feel a bit guilty monopolizing your system... Don't be. In the end I want my stuff merged without causing any regressions. > I have accumulated a collection of forward-progress ideas, so one approach > would be for me to get those

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-15 Thread Paul E. McKenney
On Mon, Apr 15, 2019 at 01:04:03PM +0200, Sebastian Andrzej Siewior wrote: > On 2019-04-15 03:56:45 [-0700], Paul E. McKenney wrote: > > This is new in rcutorture as well. It is complaining that we just got > > done with a stutter interval (in which torturing temporarily stops) > > but not

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-15 Thread Sebastian Andrzej Siewior
On 2019-04-15 03:56:45 [-0700], Paul E. McKenney wrote: > This is new in rcutorture as well. It is complaining that we just got > done with a stutter interval (in which torturing temporarily stops) > but not everything has progressed through the callback chain to be freed. > And in this case it

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-15 Thread Paul E. McKenney
On Mon, Apr 15, 2019 at 12:40:47PM +0200, Sebastian Andrzej Siewior wrote: > On 2019-04-13 07:21:53 [-0700], Paul E. McKenney wrote: > > > > And after ramping up the stress in rcutorture a bit, I am able to > > reproduce this CPU stall involving offlining on my systems. My plan is > > my usual

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-15 Thread Sebastian Andrzej Siewior
On 2019-04-13 11:17:50 [-0700], Paul E. McKenney wrote: > Oh, and probably more to the point... I reviewed your patch, and with > the subsequent changes it looks sane to me. Plus the test failures thus > far don't appear to have anything to do with your patch. However, I am > too cowardly to

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-15 Thread Sebastian Andrzej Siewior
On 2019-04-13 07:21:53 [-0700], Paul E. McKenney wrote: > > And after ramping up the stress in rcutorture a bit, I am able to > reproduce this CPU stall involving offlining on my systems. My plan is > my usual one: Keep increasing rcutorture stress to get it to reproduce > in reasonable time,

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-13 Thread Paul E. McKenney
On Sat, Apr 13, 2019 at 07:21:53AM -0700, Paul E. McKenney wrote: > On Wed, Apr 10, 2019 at 05:06:10PM -0700, Paul E. McKenney wrote: > > On Wed, Apr 10, 2019 at 01:33:02PM -0700, Paul E. McKenney wrote: > > > On Wed, Apr 10, 2019 at 09:19:18PM +0200, Sebastian Andrzej Siewior wrote: > > > > On

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-13 Thread Paul E. McKenney
On Wed, Apr 10, 2019 at 05:06:10PM -0700, Paul E. McKenney wrote: > On Wed, Apr 10, 2019 at 01:33:02PM -0700, Paul E. McKenney wrote: > > On Wed, Apr 10, 2019 at 09:19:18PM +0200, Sebastian Andrzej Siewior wrote: > > > On 2019-04-10 11:41:05 [-0700], Paul E. McKenney wrote: > > > > On Wed, Apr 10,

Re: Alleged fix for writer stall on -rcu branch dev

2019-04-10 Thread Paul E. McKenney
On Wed, Apr 10, 2019 at 01:33:02PM -0700, Paul E. McKenney wrote: > On Wed, Apr 10, 2019 at 09:19:18PM +0200, Sebastian Andrzej Siewior wrote: > > On 2019-04-10 11:41:05 [-0700], Paul E. McKenney wrote: > > > On Wed, Apr 10, 2019 at 08:15:38PM +0200, Sebastian Andrzej Siewior wrote: > > > > On