Messages in this thread | | | Date | Wed, 20 Oct 2010 12:43:24 -0400 | From | Jason Baron <> | Subject | Re: [PATCH][GIT PULL] tracing: Fix compile issue for trace_sched_wakeup.c |
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On Wed, Oct 20, 2010 at 05:40:45PM +0200, Ingo Molnar wrote: > FYI, there's a new mystery hang (sometimes crash) that triggers in -tip - and which > seems to be tracing related. See the crashlog below - config attached. > > It's not bisectable - small changes in the kernel make the bug come/go. (might be a > race of some sorts) > > Thanks, > > Ingo >
strange b/c it looks like we get though enabling/disabling the tracepoitns individually, but then when we go to enable all the tracepoints we hit this hang - perhaps, suggesting a race. Do we always fail after "Testing all events:" is printed? Does the crash have any more clues. I will try and re-produce this.
Also, I noticed some recent changes to text_poke_smp() usage of stop_machine() on Oct. 14th. That's related to the area where this appears to hang, so if things were working with this .config before then, that might be a place to look. Adding Masami to the 'cc list.
thanks,
-Jason
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