Re: Question concerning RCU

2015-01-14 Thread Paul E. McKenney
On Wed, Jan 14, 2015 at 08:38:03AM +, Stoidner, Christoph wrote: > > Hi Paul, > > > Two things to try: > > > > 1. alt-sysreq-t to get all tasks' stacks, or > > I am not able to do that since I am working on an embedded system which > has no real tty, just a serial connected terminal.

AW: Question concerning RCU

2015-01-14 Thread Stoidner, Christoph
Hi Paul, > Two things to try: > > 1. alt-sysreq-t to get all tasks' stacks, or I am not able to do that since I am working on an embedded system which has no real tty, just a serial connected terminal. > 2. disable RCU CPU stall warnings and see if the hangs go away. > As I see th

Re: Question concerning RCU

2015-01-12 Thread Paul E. McKenney
On Mon, Jan 12, 2015 at 11:48:28AM +, Stoidner, Christoph wrote: > Hi Paul, > > > You got stack traces with the stall warnings, correct? If so, please look > > at them and at Documentation/RCU/stallwarn.txt and see if the kernel is > > looping somewhere inappropriate. > > Yes and no. I have

AW: Question concerning RCU

2015-01-12 Thread Stoidner, Christoph
Hi Paul, > You got stack traces with the stall warnings, correct? If so, please look > at them and at Documentation/RCU/stallwarn.txt and see if the kernel is > looping somewhere inappropriate. Yes and no. I have a stack trace, but it is not generated by a stall warning. More precise: I can nev

Re: Question concerning RCU

2015-01-11 Thread Paul E. McKenney
On Sun, Jan 11, 2015 at 11:59:45AM +, Stoidner, Christoph wrote: > > Hi Paul, > > many thanks for your fast answer! > > Now I have changed my application in that way, that it does not require > Xenomai/I-Pipe anymore. That means my kernel is build now from > mainline source, with preempt_r

AW: Question concerning RCU

2015-01-11 Thread Stoidner, Christoph
Hi Paul, many thanks for your fast answer! Now I have changed my application in that way, that it does not require Xenomai/I-Pipe anymore. That means my kernel is build now from mainline source, with preempt_rt only and no Xenomai or I-Pipe. However the problem is exact the same. After some r

Re: Question concerning RCU

2015-01-06 Thread Paul E. McKenney
On Tue, Jan 06, 2015 at 06:16:27PM +, Stoidner, Christoph wrote: > > Hi Paul, > > sorry for contacting you directly. I have a question concerning linux's RCU > handling. In kernels MAINTAINERS I could not find any accordingly mailing > list. Is there some list anyway that I have overlooked?