RE: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Liu, Chuansheng
linux.vnet.ibm.com; Peter Zijlstra > (pet...@infradead.org); x...@kernel.org; 'linux-kernel@vger.kernel.org' > (linux-kernel@vger.kernel.org); Wang, Xiaoming; Li, Zhuangzhi > Subject: Re: Panic and page fault in loop during handling NMI backtrace > handler > > On Wed, 16 Oct 2013 01:54

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
On Wed, 16 Oct 2013 01:54:51 + "Liu, Chuansheng" wrote: > > Since the NMI iretq nesting has been fixed, there's no reason that > I think you patch fix the infinite loop, we will have a test soon. > BTW, we are using 3.10, could you help to point out which NMI iretq nesting > patch? There

RE: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Liu, Chuansheng
linux.vnet.ibm.com; Peter Zijlstra > (pet...@infradead.org); x...@kernel.org; 'linux-kernel@vger.kernel.org' > (linux-kernel@vger.kernel.org); Wang, Xiaoming; Li, Zhuangzhi > Subject: Re: Panic and page fault in loop during handling NMI backtrace > handler > > > BTW, please d

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
BTW, please do not send out HTML email, as that gets blocked from going to LKML. On Tue, 15 Oct 2013 02:01:04 + "Liu, Chuansheng" wrote: > We meet one issue that during trigger all CPU backtrace, but during in the > NMI handler arch_trigger_all_cpu_backtrace_handler, > It hit the PAGE

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
On Tue, 15 Oct 2013 14:54:11 +0200 Frederic Weisbecker wrote: > On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > > On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > > > On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > > > > We meet one

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 03:17:59PM +0200, Frederic Weisbecker wrote: > On Tue, Oct 15, 2013 at 06:06:59AM -0700, Paul E. McKenney wrote: > > On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: > > > On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: > > > > On Tue,

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 06:06:59AM -0700, Paul E. McKenney wrote: > On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: > > On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: > > > On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > > > > On Tue, Oct

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: > On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: > > On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > > > On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > > > > On Tue,

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: > On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > > On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > > > On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > > > > We meet one

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > > On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > > > We meet one issue that during trigger all CPU backtrace, but during in > > > the NMI

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: > On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > > On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > > > We meet one issue that during trigger all CPU backtrace, but during in > > > the NMI

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Peter Zijlstra
On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: > On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > > We meet one issue that during trigger all CPU backtrace, but during in the > > NMI handler arch_trigger_all_cpu_backtrace_handler, > > It hit the PAGE fault,

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: > We meet one issue that during trigger all CPU backtrace, but during in the > NMI handler arch_trigger_all_cpu_backtrace_handler, > It hit the PAGE fault, then PAGE fault is in loop, at last the thread stack > overflow, and system

RE: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Liu, Chuansheng
Zijlstra (pet...@infradead.org); x...@kernel.org; 'linux-kernel@vger.kernel.org' (linux-kernel@vger.kernel.org); Wang, Xiaoming; Li, Zhuangzhi Subject: Re: Panic and page fault in loop during handling NMI backtrace handler BTW, please do not send out HTML email, as that gets blocked from going

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
On Wed, 16 Oct 2013 01:54:51 + Liu, Chuansheng chuansheng@intel.com wrote: Since the NMI iretq nesting has been fixed, there's no reason that I think you patch fix the infinite loop, we will have a test soon. BTW, we are using 3.10, could you help to point out which NMI iretq nesting

RE: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Liu, Chuansheng
Zijlstra (pet...@infradead.org); x...@kernel.org; 'linux-kernel@vger.kernel.org' (linux-kernel@vger.kernel.org); Wang, Xiaoming; Li, Zhuangzhi Subject: Re: Panic and page fault in loop during handling NMI backtrace handler On Wed, 16 Oct 2013 01:54:51 + Liu, Chuansheng chuansheng

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet one issue that during trigger all CPU backtrace, but during in the NMI handler arch_trigger_all_cpu_backtrace_handler, It hit the PAGE fault, then PAGE fault is in loop, at last the thread stack overflow, and system

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Peter Zijlstra
On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet one issue that during trigger all CPU backtrace, but during in the NMI handler arch_trigger_all_cpu_backtrace_handler, It hit the PAGE fault, then

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet one issue that during trigger all CPU backtrace, but during in the NMI handler

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet one issue that during trigger all CPU backtrace, but during in the NMI handler

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet one issue that

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Frederic Weisbecker
On Tue, Oct 15, 2013 at 06:06:59AM -0700, Paul E. McKenney wrote: On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Paul E. McKenney
On Tue, Oct 15, 2013 at 03:17:59PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 06:06:59AM -0700, Paul E. McKenney wrote: On Tue, Oct 15, 2013 at 02:59:15PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 05:48:37AM -0700, Paul E. McKenney wrote: On Tue, Oct 15,

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
On Tue, 15 Oct 2013 14:54:11 +0200 Frederic Weisbecker fweis...@gmail.com wrote: On Tue, Oct 15, 2013 at 02:37:17PM +0200, Peter Zijlstra wrote: On Tue, Oct 15, 2013 at 02:18:53PM +0200, Frederic Weisbecker wrote: On Tue, Oct 15, 2013 at 02:01:04AM +, Liu, Chuansheng wrote: We meet

Re: Panic and page fault in loop during handling NMI backtrace handler

2013-10-15 Thread Steven Rostedt
BTW, please do not send out HTML email, as that gets blocked from going to LKML. On Tue, 15 Oct 2013 02:01:04 + Liu, Chuansheng chuansheng@intel.com wrote: We meet one issue that during trigger all CPU backtrace, but during in the NMI handler arch_trigger_all_cpu_backtrace_handler,