Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-27 Thread Paul E. McKenney
On Fri, Dec 27, 2013 at 06:15:07PM +0100, Jochen Striepe wrote: > Hi, > > On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: > > Applies, compiles, and runs smoothly on top of 3.12.6. I'll send word > > if anything odd shows up. > > Tested with various loads, everything nice

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-27 Thread Jochen Striepe
Hi, On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: > Applies, compiles, and runs smoothly on top of 3.12.6. I'll send word > if anything odd shows up. Tested with various loads, everything nice and working so far. Have a nice weekend, Jochen. -- To unsubscribe from this

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-27 Thread Jochen Striepe
Hi, On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: Applies, compiles, and runs smoothly on top of 3.12.6. I'll send word if anything odd shows up. Tested with various loads, everything nice and working so far. Have a nice weekend, Jochen. -- To unsubscribe from this

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-27 Thread Paul E. McKenney
On Fri, Dec 27, 2013 at 06:15:07PM +0100, Jochen Striepe wrote: Hi, On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: Applies, compiles, and runs smoothly on top of 3.12.6. I'll send word if anything odd shows up. Tested with various loads, everything nice and

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-21 Thread Paul E. McKenney
On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: > Hi! > > On Mon, Dec 16, 2013 at 02:40:06PM -0800, Paul E. McKenney wrote: > > > > > > rcu: Kick CPU halfway to RCU CPU stall warning > [...] > > And you are quite right, there is a prerequisite commit. I have attached > >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-21 Thread Jochen Striepe
Hi! On Mon, Dec 16, 2013 at 02:40:06PM -0800, Paul E. McKenney wrote: > > > > > rcu: Kick CPU halfway to RCU CPU stall warning [...] > And you are quite right, there is a prerequisite commit. I have attached > both, please apply in numeric order. Applies, compiles, and runs smoothly on

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-21 Thread Jochen Striepe
Hi! On Mon, Dec 16, 2013 at 02:40:06PM -0800, Paul E. McKenney wrote: rcu: Kick CPU halfway to RCU CPU stall warning [...] And you are quite right, there is a prerequisite commit. I have attached both, please apply in numeric order. Applies, compiles, and runs smoothly on top of

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-21 Thread Paul E. McKenney
On Sun, Dec 22, 2013 at 03:25:23AM +0100, Jochen Striepe wrote: Hi! On Mon, Dec 16, 2013 at 02:40:06PM -0800, Paul E. McKenney wrote: rcu: Kick CPU halfway to RCU CPU stall warning [...] And you are quite right, there is a prerequisite commit. I have attached both, please

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-16 Thread Paul E. McKenney
On Tue, Dec 10, 2013 at 12:22:57PM +0100, Jochen Striepe wrote: > Hi again, > > On Fri, Dec 06, 2013 at 06:54:41AM -0800, Paul E. McKenney wrote: > > On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: > > > On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: > > >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-16 Thread Paul E. McKenney
On Tue, Dec 10, 2013 at 12:22:57PM +0100, Jochen Striepe wrote: Hi again, On Fri, Dec 06, 2013 at 06:54:41AM -0800, Paul E. McKenney wrote: On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: Hmmm...

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-10 Thread Jochen Striepe
Hi again, On Fri, Dec 06, 2013 at 06:54:41AM -0800, Paul E. McKenney wrote: > On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: > > On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: > > > Hmmm... Does the following patch help? > > [...] > > > rcu: Kick CPU

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-10 Thread Jochen Striepe
Hi again, On Fri, Dec 06, 2013 at 06:54:41AM -0800, Paul E. McKenney wrote: On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: Hmmm... Does the following patch help? [...] rcu: Kick CPU halfway to

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-06 Thread Paul E. McKenney
On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: > Hi again, > > On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: > > Hmmm... Does the following patch help? > [...] > > rcu: Kick CPU halfway to RCU CPU stall warning > > The stall didn't appear at all since

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-06 Thread Jochen Striepe
Hi again, On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: > Hmmm... Does the following patch help? [...] > rcu: Kick CPU halfway to RCU CPU stall warning The stall didn't appear at all since my last email, running 3.12.x kernels since release. But I will test your

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-06 Thread Jochen Striepe
Hi again, On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: Hmmm... Does the following patch help? [...] rcu: Kick CPU halfway to RCU CPU stall warning The stall didn't appear at all since my last email, running 3.12.x kernels since release. But I will test your patch

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-06 Thread Paul E. McKenney
On Fri, Dec 06, 2013 at 02:58:04PM +0100, Jochen Striepe wrote: Hi again, On Thu, Dec 05, 2013 at 04:26:14PM -0800, Paul E. McKenney wrote: Hmmm... Does the following patch help? [...] rcu: Kick CPU halfway to RCU CPU stall warning The stall didn't appear at all since my last

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-05 Thread Paul E. McKenney
On Mon, Sep 23, 2013 at 06:49:31PM +0200, Jochen Striepe wrote: > Hello again, > > On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: > > On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > > > rcu: Reject memory-order-induced stall-warning false positives > >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-12-05 Thread Paul E. McKenney
On Mon, Sep 23, 2013 at 06:49:31PM +0200, Jochen Striepe wrote: Hello again, On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: rcu: Reject memory-order-induced stall-warning false positives I run

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-23 Thread Jochen Striepe
Hello again, On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: > On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > > rcu: Reject memory-order-induced stall-warning false positives > > I run this patch on top of 3.10.11 vanilla since Wednesday, so far >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-23 Thread Jochen Striepe
Hello again, On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: rcu: Reject memory-order-induced stall-warning false positives I run this patch on top of 3.10.11 vanilla since Wednesday, so far without

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-14 Thread Paul E. McKenney
On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: > Hello again, > > On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > > Several people helped track down another source of spurious stall > > warnings on large systems, please see below for the patch. > [...] >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-14 Thread Jochen Striepe
Hello again, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > Several people helped track down another source of spurious stall > warnings on large systems, please see below for the patch. [...] >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-14 Thread Jochen Striepe
Hello again, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: Several people helped track down another source of spurious stall warnings on large systems, please see below for the patch. [...]

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-14 Thread Paul E. McKenney
On Sat, Sep 14, 2013 at 01:28:34PM +0200, Jochen Striepe wrote: Hello again, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: Several people helped track down another source of spurious stall warnings on large systems, please see below for the patch. [...]

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-11 Thread Jochen Striepe
Hello, On Tue, Sep 10, 2013 at 10:54:53AM -0700, Paul E. McKenney wrote: > Their stall was due to old-style creation of sysfs entries for memory. > Yours might be having a similar issue with the creation of /dev entries, > so it would be worth trying it. OK, compiling 3.10.11 with your

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-11 Thread Jochen Striepe
Hello, On Tue, Sep 10, 2013 at 10:54:53AM -0700, Paul E. McKenney wrote: Their stall was due to old-style creation of sysfs entries for memory. Yours might be having a similar issue with the creation of /dev entries, so it would be worth trying it. OK, compiling 3.10.11 with your

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-10 Thread Paul E. McKenney
On Tue, Sep 10, 2013 at 09:45:50AM +0200, Jochen Striepe wrote: > Hello, > > On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > > On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: > > > I just got this on 3.10.11 on the same machine. Could that be > > >

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-10 Thread Jochen Striepe
Hello, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: > On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: > > I just got this on 3.10.11 on the same machine. Could that be > > related? > > Several people helped track down another source of spurious stall

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-10 Thread Jochen Striepe
Hello, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: I just got this on 3.10.11 on the same machine. Could that be related? Several people helped track down another source of spurious stall

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-10 Thread Paul E. McKenney
On Tue, Sep 10, 2013 at 09:45:50AM +0200, Jochen Striepe wrote: Hello, On Mon, Sep 09, 2013 at 03:27:51PM -0700, Paul E. McKenney wrote: On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: I just got this on 3.10.11 on the same machine. Could that be related?

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-09 Thread Paul E. McKenney
On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: > Hi again, > > On Sun, Aug 18, 2013 at 08:48:49PM +0200, Jochen Striepe wrote: > > Unfortunately, I was not able to reproduce that behaviour since. > > I just got this on 3.10.11 on the same machine. Could that be > related?

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-09-09 Thread Paul E. McKenney
On Mon, Sep 09, 2013 at 11:58:36PM +0200, Jochen Striepe wrote: Hi again, On Sun, Aug 18, 2013 at 08:48:49PM +0200, Jochen Striepe wrote: Unfortunately, I was not able to reproduce that behaviour since. I just got this on 3.10.11 on the same machine. Could that be related? Just

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-08-18 Thread Jochen Striepe
Hello, On Sun, Aug 18, 2013 at 11:02:32AM -0700, Paul E. McKenney wrote: > On Tue, Aug 13, 2013 at 12:32:03PM +0200, Jochen Striepe wrote: > > just hit this one. Please tell me if you need any more information. > > If you wait for a few minutes after the first stall warning message, > do

Re: 3.10.5: rcu_sched detected stalls on CPUs/tasks

2013-08-18 Thread Jochen Striepe
Hello, On Sun, Aug 18, 2013 at 11:02:32AM -0700, Paul E. McKenney wrote: On Tue, Aug 13, 2013 at 12:32:03PM +0200, Jochen Striepe wrote: just hit this one. Please tell me if you need any more information. If you wait for a few minutes after the first stall warning message, do you