Re: [RFC PATCH 1/6] trace/stack: Move code to save the stack trace into a separate function

[Steven Rostedt]

On Wed, 02 Jun 2021 16:05:18 +0530
"Naveen N. Rao" <naveen.n.rao@xxxxxxxxxxxxxxxxxx> wrote:

> It seems to be working fine otherwise. The one limitation though is down 
> to how ftrace works on powerpc -- the mcount call is before a function 
> sets up its own stackframe. Due to this, we won't ever be able to 
> account for the stackframe from a leaf function -- but, that's a fairly 
> minor limitation.

And this is true for x86 as well because it no longer uses mcount, but
uses fentry instead (called before stack setup), but I figured there's
not much we could do about it.

-- Steve