Re: [PATCH 8/8] watchdog: Remove hack to make full dynticks working

2013-07-23 Thread Peter Zijlstra
On Tue, Jul 23, 2013 at 08:33:31AM -0400, Don Zickus wrote: > On Tue, Jul 23, 2013 at 02:31:06AM +0200, Frederic Weisbecker wrote: > > A perf event can be used without forcing the tick to > > stay alive if it doesn't use a frequency but a sample > > period and if it doesn't throttle (raise storm of

Re: [PATCH 8/8] watchdog: Remove hack to make full dynticks working

2013-07-23 Thread Frederic Weisbecker
On Tue, Jul 23, 2013 at 08:33:31AM -0400, Don Zickus wrote: > On Tue, Jul 23, 2013 at 02:31:06AM +0200, Frederic Weisbecker wrote: > > A perf event can be used without forcing the tick to > > stay alive if it doesn't use a frequency but a sample > > period and if it doesn't throttle (raise storm of

Re: [PATCH 8/8] watchdog: Remove hack to make full dynticks working

2013-07-23 Thread Don Zickus
On Tue, Jul 23, 2013 at 02:31:06AM +0200, Frederic Weisbecker wrote: > A perf event can be used without forcing the tick to > stay alive if it doesn't use a frequency but a sample > period and if it doesn't throttle (raise storm of events). > > Since the lockup detector neither use a perf event fr

[PATCH 8/8] watchdog: Remove hack to make full dynticks working

2013-07-22 Thread Frederic Weisbecker
A perf event can be used without forcing the tick to stay alive if it doesn't use a frequency but a sample period and if it doesn't throttle (raise storm of events). Since the lockup detector neither use a perf event frequency nor should ever throttle due to its high period, it can now run concurr