Re: [rcu_sched stall] regression/miss-config ?

2016-05-19 Thread Paul E. McKenney
On Thu, May 19, 2016 at 04:45:26PM -0700, Santosh Shilimkar wrote: > Hi Paul, > > On 5/17/2016 12:15 PM, Paul E. McKenney wrote: > >On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: > >>On 5/16/16 5:58 PM, Paul E. McKenney wrote: > >>>On Mon, May 16, 2016 at 12:49:41PM

Re: [rcu_sched stall] regression/miss-config ?

2016-05-19 Thread Paul E. McKenney
On Thu, May 19, 2016 at 04:45:26PM -0700, Santosh Shilimkar wrote: > Hi Paul, > > On 5/17/2016 12:15 PM, Paul E. McKenney wrote: > >On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: > >>On 5/16/16 5:58 PM, Paul E. McKenney wrote: > >>>On Mon, May 16, 2016 at 12:49:41PM

Re: [rcu_sched stall] regression/miss-config ?

2016-05-19 Thread Santosh Shilimkar
Hi Paul, On 5/17/2016 12:15 PM, Paul E. McKenney wrote: On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: On 5/16/16 5:58 PM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: On 5/16/2016 10:34 AM, Paul E. McKenney wrote:

Re: [rcu_sched stall] regression/miss-config ?

2016-05-19 Thread Santosh Shilimkar
Hi Paul, On 5/17/2016 12:15 PM, Paul E. McKenney wrote: On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: On 5/16/16 5:58 PM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: On 5/16/2016 10:34 AM, Paul E. McKenney wrote:

Re: [rcu_sched stall] regression/miss-config ?

2016-05-17 Thread Paul E. McKenney
On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: > On 5/16/16 5:58 PM, Paul E. McKenney wrote: > >On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: > >>On 5/16/2016 10:34 AM, Paul E. McKenney wrote: > >>>On Mon, May 16, 2016 at 09:33:57AM -0700,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-17 Thread Paul E. McKenney
On Tue, May 17, 2016 at 06:46:22AM -0700, santosh.shilim...@oracle.com wrote: > On 5/16/16 5:58 PM, Paul E. McKenney wrote: > >On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: > >>On 5/16/2016 10:34 AM, Paul E. McKenney wrote: > >>>On Mon, May 16, 2016 at 09:33:57AM -0700,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-17 Thread santosh.shilim...@oracle.com
On 5/16/16 5:58 PM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: On 5/16/2016 10:34 AM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: [...] Are you running CONFIG_NO_HZ_FULL=y? If so, the problem

Re: [rcu_sched stall] regression/miss-config ?

2016-05-17 Thread santosh.shilim...@oracle.com
On 5/16/16 5:58 PM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: On 5/16/2016 10:34 AM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: [...] Are you running CONFIG_NO_HZ_FULL=y? If so, the problem

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: > On 5/16/2016 10:34 AM, Paul E. McKenney wrote: > >On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: > >>On 5/16/2016 5:03 AM, Paul E. McKenney wrote: > >>>On Sun, May 15, 2016 at 09:35:40PM -0700,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Mon, May 16, 2016 at 12:49:41PM -0700, Santosh Shilimkar wrote: > On 5/16/2016 10:34 AM, Paul E. McKenney wrote: > >On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: > >>On 5/16/2016 5:03 AM, Paul E. McKenney wrote: > >>>On Sun, May 15, 2016 at 09:35:40PM -0700,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Santosh Shilimkar
On 5/16/2016 10:34 AM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: On 5/16/2016 5:03 AM, Paul E. McKenney wrote: On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Santosh Shilimkar
On 5/16/2016 10:34 AM, Paul E. McKenney wrote: On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: On 5/16/2016 5:03 AM, Paul E. McKenney wrote: On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul,

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: > On 5/16/2016 5:03 AM, Paul E. McKenney wrote: > >On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: > >>On 5/15/16 2:18 PM, Santosh Shilimkar wrote: > >>>Hi Paul, > >>> > >>>I was asking Sasha about [1]

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Mon, May 16, 2016 at 09:33:57AM -0700, Santosh Shilimkar wrote: > On 5/16/2016 5:03 AM, Paul E. McKenney wrote: > >On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: > >>On 5/15/16 2:18 PM, Santosh Shilimkar wrote: > >>>Hi Paul, > >>> > >>>I was asking Sasha about [1]

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Santosh Shilimkar
On 5/16/2016 5:03 AM, Paul E. McKenney wrote: On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Santosh Shilimkar
On 5/16/2016 5:03 AM, Paul E. McKenney wrote: On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: > On 5/15/16 2:18 PM, Santosh Shilimkar wrote: > >Hi Paul, > > > >I was asking Sasha about [1] since other folks in Oracle > >also stumbled upon similar RCU stalls with v4.1 kernel in > >different workloads. I was

Re: [rcu_sched stall] regression/miss-config ?

2016-05-16 Thread Paul E. McKenney
On Sun, May 15, 2016 at 09:35:40PM -0700, santosh.shilim...@oracle.com wrote: > On 5/15/16 2:18 PM, Santosh Shilimkar wrote: > >Hi Paul, > > > >I was asking Sasha about [1] since other folks in Oracle > >also stumbled upon similar RCU stalls with v4.1 kernel in > >different workloads. I was

Re: [rcu_sched stall] regression/miss-config ?

2016-05-15 Thread santosh.shilim...@oracle.com
On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in different workloads. I was reported similar issue with RDS as well and looking at [1], [2], [3] and [4], thought of reaching

Re: [rcu_sched stall] regression/miss-config ?

2016-05-15 Thread santosh.shilim...@oracle.com
On 5/15/16 2:18 PM, Santosh Shilimkar wrote: Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in different workloads. I was reported similar issue with RDS as well and looking at [1], [2], [3] and [4], thought of reaching

[rcu_sched stall] regression/miss-config ?

2016-05-15 Thread Santosh Shilimkar
Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in different workloads. I was reported similar issue with RDS as well and looking at [1], [2], [3] and [4], thought of reaching out to see if you can help us to understand

[rcu_sched stall] regression/miss-config ?

2016-05-15 Thread Santosh Shilimkar
Hi Paul, I was asking Sasha about [1] since other folks in Oracle also stumbled upon similar RCU stalls with v4.1 kernel in different workloads. I was reported similar issue with RDS as well and looking at [1], [2], [3] and [4], thought of reaching out to see if you can help us to understand