Re: [PATCH v2 RESEND] function_graph: Support recording and printing the function return address

[Steven Rostedt <rostedt@goodmis.org>]

On Wed,  9 Oct 2024 11:03:40 +0800
Donglin Peng <dolinux.peng@gmail.com> wrote:

> From: Donglin Peng <pengdonglin@xiaomi.com>
> 
> When using function_graph tracer to analyze the flow of kernel function
> execution, it is often necessary to quickly locate the exact line of code
> where the call occurs. While this may be easy at times, it can be more
> time-consuming when some functions are inlined or the flow is too long.
> 
> This feature aims to simplify the process by recording the return address
> of traced funcions and printing it when outputing trace logs.
> 
> To enhance human readability, the prefix 'ret=' is used for the kernel return
> value, while '<-' serves as the prefix for the return address in trace logs to
> make it look more like the function tracer.
> 
> A new trace option named 'funcgraph-retaddr' has been introduced, and the
> existing option 'sym-addr' can be used to control the format of the return
> address.
> 

Is there a reason for the resend? I already have it in my for-next branch.

-- Steve