Messages in this thread | | | Subject | Re: [BUG?] tracing/function_graph: set_graph_function was broken from 2.6.36-rc2 | From | Steven Rostedt <> | Date | Fri, 21 Jan 2011 13:40:31 -0500 |
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On Fri, 2011-01-21 at 17:27 +0800, wu zhangjin wrote: > On Fri, Jan 21, 2011 at 1:30 AM, Steven Rostedt <srostedt@redhat.com> wrote:
> >> trace_graph_entry(): > >> > >> [snip] > >> /* trace it when it is-nested-in or is a function enabled. */ > >> if (!(trace->depth || ftrace_graph_addr(trace->func)) || > >> ftrace_graph_ignore_irqs()) > >> return 0; > >> [snip] > >> > > By default, ftrace_graph_ignore_irqs() is false, then, if we don't put > 0 to /debug/tracing/options/funcgraph-irqs, it will not return even if > we have specified some entries through the tracing/set_graph_function > interface, as a result, every function will be traced and it doesn't > work as we expected, the expected result is only the specified > functions are reserved in the tracing result. >
???
It's an or, if the first case is true:
!(trace->depth || ftrace_graph_addr(trace->func))
then we return and do not trace. Regardless of what ftrace_graph_ignore_irqs() is set to.
Can you show me an example of what you are having a problem with?
-- Steve
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