Messages in this thread | | | Date | Tue, 04 May 2010 19:33:07 -0500 | From | Larry Finger <> | Subject | Re: How to write marker info in MMIO trace from kernel |
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On 05/04/2010 05:58 PM, Steven Rostedt wrote: > On Tue, 2010-05-04 at 17:27 -0500, Larry Finger wrote: > >> Thanks for the info. One other question - when I write only mmiotrace to >> the current_tracer, the trace_printk() stuff does not end up in the >> buffer. I can get it by using the "sysprof" tracer, but that has a lot >> of stuff I do not want. Did I miss some configuration? My list of >> available tracers is "blk kmemtrace mmiotrace wakeup_rt wakeup function >> sysprof sched_switch nop". > > Ug, that's because the mmiotrace handles its own prints and ignores > anything it does not know about. Here, try this patch: > > -- Steve > > diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c > index 017fa37..8652f28 100644 > --- a/kernel/trace/trace_mmiotrace.c > +++ b/kernel/trace/trace_mmiotrace.c > @@ -282,7 +282,7 @@ static enum print_line_t mmio_print_line(struct trace_iterator *iter) > case TRACE_PRINT: > return mmio_print_mark(iter); > default: > - return TRACE_TYPE_HANDLED; /* ignore unknown entries */ > + return TRACE_TYPE_UNHANDLED; > } > }
That did the trick.
Thanks a lot,
Larry
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