Re: [PATCH V3 8/9] tracing: Add osnoise tracer

[Daniel Bristot de Oliveira]

On 6/4/21 11:28 PM, Steven Rostedt wrote:
>> +	/*
>> +	 * This is an evidence of race conditions that cause
>> +	 * a value to be "discounted" too much.
>> +	 */
>> +	if (duration < 0)
>> +		pr_err("int safe negative!\n");
> Probably want to have this happen at most once a run. If something were
> to break, I don't think we want this to live lock the machine doing
> tons of prints. We could have a variable stored on the
> osnoise_variables that states this was printed. Check that variable to
> see if it wasn't printed during a run (when current_tracer was set),
> and print only once if it is.

I created a "bool tainted" variable, that is set true if any problem with time()
related functions happen. I will pr_warn that there is a problem on _start(),
but also print this info at the top of the tracer header, so it is clear also
from the trace output.

Thoughts?

-- Daniel