Re: [RFC PATCH 1/6] trace/stack: Move code to save the stack trace into a separate function
From: Steven Rostedt
Date: Wed Jun 02 2021 - 10:11:04 EST
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.