Published at LXer:
The Ftrace tracing utility has many different features that will assist in tracking down Linux kernel problems. The previous article discussed setting up Ftrace, using the function and function graph tracers, using trace_printk(), and a simple way to stop the recording of a trace from user space. This installment will touch on how user space can interact with Ftrace, faster ways of stopping the trace, debugging a crash, and finding what kernel functions are the biggest stack hogs.
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