Messages in this thread | | | Date | Fri, 1 Aug 2008 09:43:31 -0700 | From | Randy Dunlap <> | Subject | Re: [PATCH v2 2/2] ftrace: printk formatting infrastructure |
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On Fri, 01 Aug 2008 12:26:41 -0400 Steven Rostedt wrote:
> +/** > + * ftrace_printk - printf formatting in the ftrace buffer > + * @fmt - the printf format for printing.
* @fmt: the printf format for printing * @ip: <description>
> + * > + * Note: __ftrace_printk is an internal function for ftrace_printk and > + * the @ip is passed in via the ftrace_printk macro. > + * > + * This function allows a kernel developer to debug fast path sections > + * that printk is not appropriate for. By scattering in various > + * printk like tracing in the code, a developer can quickly see > + * where problems are occurring. > + * > + * This is intended as a debugging tool for the developer only. > + * Please reframe from leaving ftrace_printks scattered around in > + * your code. > + */ > +int __ftrace_printk(unsigned long ip, const char *fmt, ...) > +{
--- ~Randy Linux Plumbers Conference, 17-19 September 2008, Portland, Oregon USA http://linuxplumbersconf.org/
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