Re: [RFC PATCH] powerpc/ftrace: Refactoring and support for -fpatchable-function-entry

Christophe Leroy wrote:

Le 23/05/2023 à 11:31, Naveen N Rao a écrit :

quoted

Christophe Leroy wrote:

quoted

Ok, I simplified this further, and this is as close to the previous 
fast path as we can get (applies atop the original RFC). The only 
difference left is the ftrace_rec iterator.

That's not better, that's even slightly worse (less than 1%).

I will try to investigate why.

I have posted a follow-on RFC with the changes split up:
http://lore.kernel.org/cover.1686151854.git.naveen@kernel.org (local)

Hopefully, that will help narrow down the source of the regression.

- Naveen