Messages in this thread | | | Subject | Re: ftrace introduces instability into kernel 2.6.27(-rc2,-rc3) | From | Benjamin Herrenschmidt <> | Date | Tue, 19 Aug 2008 11:51:32 +1000 |
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On Mon, 2008-08-18 at 11:07 -0400, Steven Rostedt wrote: > Eran Liberty wrote: > > After compiling a kernel with ftrace I started to experience all sorts > > of crashes. > > Just to make sure... > > ftrace enables markers too, and RCU has tracing with the markers. This > may not be the problem, but I just want to eliminate as many variables > as possible. > Could you disable ftrace, but keep the markers on too. Also, could you > enable ftrace again and turn on the FTRACE_STARTUP_TEST.
I spent some time last week tracking one of those crashes and it appears that we are getting corruption of some of the non-volatile registers.
So far, I found out that it -seems- to be coming from stack frame corruption during a timer interrupt.
I haven't had a chance to dig further yet.
Cheers, Ben.
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