When looking at the syslog (dmesg), I get several of:
<module name>: module has bad taint, not creating trace events
What does this mean ?
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This warning appears if kernel function trace_module_has_bad_taint() returns true; namely any of the following taint flags have been set:
The warning occurs when a kernel module is loaded and the kernel tracepoint driver is notified of this and detects one of the above tainting reasons and skips trace-pointing it to try to avoid crashing the kernel.
Modules that are just tainted as staging drivers, out-of-tree drivers and unsigned GPL modules are allowed, all other taints are not allowed.