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. -- Best regards, Andrey Skvortsov Secure eMail with gnupg: See http://www.gnupg.org/ PGP Key ID: 0x57A3AEAD
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