linux-kernel - Re: [PATCH] perf/core: allow ftrace for functions in kernel/event/core.c

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Date:   Tue, 12 Oct 2021 14:42:21 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Song Liu <songliubraving@...com>
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, acme@...nel.org,
        mingo@...hat.com, Steven Rostedt <rostedt@...dmis.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        KP Singh <kpsingh@...nel.org>
Subject: Re: [PATCH] perf/core: allow ftrace for functions in
 kernel/event/core.c

On Wed, Oct 06, 2021 at 02:07:32PM -0700, Song Liu wrote:
> It is useful to trace functions in kernel/event/core.c. Allow ftrace for
> them by removing $(CC_FLAGS_FTRACE) from Makefile.
> 
> ---
> We had some discussions about this last year [1]. Seems that enabling
> ftrace in kernel/events won't really cause fatal recursion in the tests.
> Shall we give it another try?

I suppose we can give it a go..