Messages in this thread |  | | Date | Sun, 16 Nov 2008 16:19:04 +0530 | From | "Aneesh Kumar K.V" <> | Subject | Re: [PATCH 2/3] ftrace: Add debug_print trace to print data from kernel to userspace |
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On Fri, Nov 14, 2008 at 03:39:29PM +0100, Frédéric Weisbecker wrote: > 2008/11/14 Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>: > > We also want to make sure dp_printk doesn't do anything when tracer > > is disabled. We do > > > > int do_dp_printk(const char *fmt, ...) > > { > > int ret; > > va_list args; > > > > if (!tracer_enabled) > > return 0; > > > In this case you just have to do > echo 0 > /debug/tracing/tracing_enabled > And the entries will not be printed anymore....
That would prevent us to have both dp_printk and debug_dump used at the same time. Both will them depend on the tracer_enabled flag. That means the output of these call will also interact with rest of the tracer output.
-aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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