On 8 December 2015 at 19:29, Andrey Skvortsov <andrej.skvortzov@xxxxxxxxx> wrote: > On 08 Dec, Jay Aurabind wrote: >> Hi, >> >> I know I can use ftrace or perf to do tracing on modules that I can >> load from the userspace. But what if I want to do tracing on a driver >> which is built in ? For example, i915. There wouldnt be any userspace >> to trigger a trace when it does an init. Even if I recompile i915 as >> a module, I am not able to unload it. >> >> Are there any specific tools or techniques for doing this ? > > Hi, Jay, > > if you need to trace init functions of built-in drivers, you can > enable ftrace at kernel start using parameters: > ftrace, ftrace_filter, ftrace_notrace,... . > > See Documentation/kernel-parameters.txt for more details. > > Thank you Andrey. > > -- > Best regards, > Andrey Skvortsov > > Secure eMail with gnupg: See http://www.gnupg.org/ > PGP Key ID: 0x57A3AEAD -- Thanks and Regards, Aurabindo J _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
