Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-18 Thread Paul E. McKenney
On Mon, May 18, 2020 at 01:54:13PM +0800, Rong Chen wrote: > > > On 5/18/20 5:47 AM, Paul E. McKenney wrote: > > On Fri, May 15, 2020 at 02:36:26PM -0400, Qian Cai wrote: > > > > > > > On May 14, 2020, at 2:13 PM, Paul E. McKenney > > > > wrote: > > > > > > > > Fair enough! And yes, the Linu

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-17 Thread Rong Chen
On 5/18/20 5:47 AM, Paul E. McKenney wrote: On Fri, May 15, 2020 at 02:36:26PM -0400, Qian Cai wrote: On May 14, 2020, at 2:13 PM, Paul E. McKenney wrote: Fair enough! And yes, the Linux kernel is quite large, so I certainly am not asking you to test the whole thing yourself. Ok, I saw

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-17 Thread Paul E. McKenney
On Fri, May 15, 2020 at 02:36:26PM -0400, Qian Cai wrote: > > > > On May 14, 2020, at 2:13 PM, Paul E. McKenney wrote: > > > > Fair enough! And yes, the Linux kernel is quite large, so I certainly am > > not asking you to test the whole thing yourself. > > Ok, I saw 0day bot also started to r

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-15 Thread Qian Cai
> On May 14, 2020, at 2:13 PM, Paul E. McKenney wrote: > > Fair enough! And yes, the Linux kernel is quite large, so I certainly am > not asking you to test the whole thing yourself. Ok, I saw 0day bot also started to report those which is good. For example, lkml.org/lkml/2020/5/12/1358 wh

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Paul E. McKenney
; > >>>>> On Thu, May 14, 2020 at 08:31:13AM -0400, Qian Cai wrote: > >>>>>> > >>>>>> > >>>>>>> On May 14, 2020, at 8:25 AM, Stephen Rothwell > >>>>>>> wrote: > >>>>>>> &g

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Qian Cai
; On May 14, 2020, at 8:25 AM, Stephen Rothwell >>>>>>> wrote: >>>>>>> >>>>>>> Hi Paul, >>>>>>> >>>>>>> This patch in the rcu tree >>>>>>> >>>>>>> d13

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Paul E. McKenney
McKenney wrote: > >>> > >>> On Thu, May 14, 2020 at 08:31:13AM -0400, Qian Cai wrote: > >>>> > >>>> > >>>>> On May 14, 2020, at 8:25 AM, Stephen Rothwell > >>>>> wrote: > >>>>&g

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Qian Cai
rote: >>>> >>>> >>>>> On May 14, 2020, at 8:25 AM, Stephen Rothwell >>>>> wrote: >>>>> >>>>> Hi Paul, >>>>> >>>>> This patch in the rcu tree >>>>> >>>&g

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Paul E. McKenney
, Stephen Rothwell > >>> wrote: > >>> > >>> Hi Paul, > >>> > >>> This patch in the rcu tree > >>> > >>> d13fee049fa8 ("Default enable RCU list lockdep debugging with PROVE_RCU") > >&g

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Qian Cai
> On May 14, 2020, at 9:33 AM, Paul E. McKenney wrote: > > On Thu, May 14, 2020 at 08:31:13AM -0400, Qian Cai wrote: >> >> >>> On May 14, 2020, at 8:25 AM, Stephen Rothwell wrote: >>> >>> Hi Paul, >>> >>> This patch in th

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Qian Cai
> On May 14, 2020, at 9:33 AM, Paul E. McKenney wrote: > > On Thu, May 14, 2020 at 08:31:13AM -0400, Qian Cai wrote: >> >> >>> On May 14, 2020, at 8:25 AM, Stephen Rothwell wrote: >>> >>> Hi Paul, >>> >>> This patch in th

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Paul E. McKenney
On Thu, May 14, 2020 at 08:31:13AM -0400, Qian Cai wrote: > > > > On May 14, 2020, at 8:25 AM, Stephen Rothwell wrote: > > > > Hi Paul, > > > > This patch in the rcu tree > > > > d13fee049fa8 ("Default enable RCU list lockdep debugging

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Qian Cai
> On May 14, 2020, at 8:25 AM, Stephen Rothwell wrote: > > Hi Paul, > > This patch in the rcu tree > > d13fee049fa8 ("Default enable RCU list lockdep debugging with PROVE_RCU") > > is causing whack-a-mole in the syzbot testing of linux-next. Beca

Re: Default enable RCU list lockdep debugging with PROVE_RCU

2020-05-14 Thread Stephen Rothwell
Hi Paul, This patch in the rcu tree d13fee049fa8 ("Default enable RCU list lockdep debugging with PROVE_RCU") is causing whack-a-mole in the syzbot testing of linux-next. Because they always do a debug build of linux-next, no testing is getting done. :-( Can we find another way t