Re: perf PPC: kernel panic with callchains and context switch events

2011-07-25 Thread David Ahern
Hi Ben: On 07/24/2011 07:55 PM, Benjamin Herrenschmidt wrote: > On Sun, 2011-07-24 at 11:18 -0600, David Ahern wrote: >> On 07/20/2011 03:57 PM, David Ahern wrote: >>> I am hoping someone familiar with PPC can help understand a panic that >>> is generated when capturing callchains with context swi

Re: perf PPC: kernel panic with callchains and context switch events

2011-07-24 Thread Benjamin Herrenschmidt
On Sun, 2011-07-24 at 11:18 -0600, David Ahern wrote: > On 07/20/2011 03:57 PM, David Ahern wrote: > > I am hoping someone familiar with PPC can help understand a panic that > > is generated when capturing callchains with context switch events. > > > > Call trace is below. The short of it is that

Re: perf PPC: kernel panic with callchains and context switch events

2011-07-24 Thread David Ahern
On 07/20/2011 03:57 PM, David Ahern wrote: > I am hoping someone familiar with PPC can help understand a panic that > is generated when capturing callchains with context switch events. > > Call trace is below. The short of it is that walking the callchain > generates a page fault. To handle the pa