Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 09:49:09PM +0100, Russell King - ARM Linux wrote: > On Tue, Jul 14, 2015 at 09:26:00AM -0700, Paul E. McKenney wrote: > > On Tue, Jul 14, 2015 at 01:06:32PM -0300, Fabio Estevam wrote: > > > Hi Paul, > > > > > > On Tue, Jul 14, 2015 at 1:00 PM, Paul E. McKenney > > > wrote

Re: mx6: suspicious RCU usage

2015-07-14 Thread Russell King - ARM Linux
On Tue, Jul 14, 2015 at 09:26:00AM -0700, Paul E. McKenney wrote: > On Tue, Jul 14, 2015 at 01:06:32PM -0300, Fabio Estevam wrote: > > Hi Paul, > > > > On Tue, Jul 14, 2015 at 1:00 PM, Paul E. McKenney > > wrote: > > > > > Does this patch help? > > > > > > https://lkml.org/lkml/2015/5/12

Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 01:59:10PM -0300, Fabio Estevam wrote: > On Tue, Jul 14, 2015 at 1:44 PM, Fabio Estevam wrote: > > > With your patch applied I am running several suspend/resume cycles and > > I am seeing different problems now from time to time (like 1 out 10 > > times). The kernel dump d

Re: mx6: suspicious RCU usage

2015-07-14 Thread Fabio Estevam
On Tue, Jul 14, 2015 at 1:44 PM, Fabio Estevam wrote: > With your patch applied I am running several suspend/resume cycles and > I am seeing different problems now from time to time (like 1 out 10 > times). The kernel dump does not look like the same every time, but > here is one example: Here i

Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 01:44:15PM -0300, Fabio Estevam wrote: > Hi Paul, > > On Tue, Jul 14, 2015 at 1:26 PM, Paul E. McKenney > wrote: > > > Glad it helped! > > > > Russell, did you want me to push this, or would you rather take it? > > With your patch applied I am running several suspend/res

Re: mx6: suspicious RCU usage

2015-07-14 Thread Fabio Estevam
Hi Paul, On Tue, Jul 14, 2015 at 1:26 PM, Paul E. McKenney wrote: > Glad it helped! > > Russell, did you want me to push this, or would you rather take it? With your patch applied I am running several suspend/resume cycles and I am seeing different problems now from time to time (like 1 out 10

Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 01:06:32PM -0300, Fabio Estevam wrote: > Hi Paul, > > On Tue, Jul 14, 2015 at 1:00 PM, Paul E. McKenney > wrote: > > > Does this patch help? > > > > https://lkml.org/lkml/2015/5/12/885 > > I am using an ARM 32-bit machine, so I used this one instead: > https://lk

Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 09:00:06AM -0700, Paul E. McKenney wrote: > On Tue, Jul 14, 2015 at 12:54:15PM -0300, Fabio Estevam wrote: > > Hi, > > > > I am running 4.2-rc2 on a mx6q board and I see the following warning > > when doing a suspend/resume cycle: > > > > $ echo mem > /sys/power/state > >

Re: mx6: suspicious RCU usage

2015-07-14 Thread Fabio Estevam
Hi Paul, On Tue, Jul 14, 2015 at 1:00 PM, Paul E. McKenney wrote: > Does this patch help? > > https://lkml.org/lkml/2015/5/12/885 I am using an ARM 32-bit machine, so I used this one instead: https://lkml.org/lkml/2015/5/12/892 , and it fixes the problem. Thanks! Feel free to add: Te

Re: mx6: suspicious RCU usage

2015-07-14 Thread Paul E. McKenney
On Tue, Jul 14, 2015 at 12:54:15PM -0300, Fabio Estevam wrote: > Hi, > > I am running 4.2-rc2 on a mx6q board and I see the following warning > when doing a suspend/resume cycle: > > $ echo mem > /sys/power/state > > PM: Syncing filesystems ... done. > Freezing user space processes ... (elapsed

mx6: suspicious RCU usage

2015-07-14 Thread Fabio Estevam
Hi, I am running 4.2-rc2 on a mx6q board and I see the following warning when doing a suspend/resume cycle: $ echo mem > /sys/power/state PM: Syncing filesystems ... done. Freezing user space processes ... (elapsed 0.003 seconds) done. Freezing remaining freezable tasks ... (elapsed 0.003 second