From: Steven Rostedt <rostedt@goodmis.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
mhiramat@kernel.org, bristot@redhat.com, jbaron@akamai.com,
torvalds@linux-foundation.org, tglx@linutronix.de,
namit@vmware.com, hpa@zytor.com, luto@kernel.org,
ard.biesheuvel@linaro.org, jpoimboe@redhat.com,
hjl.tools@gmail.com, Andrew Morton <akpm@linux-foundation.org>,
Borislav Petkov <bp@alien8.de>,
Denys Vlasenko <dvlasenk@redhat.com>
Subject: Re: [RFC][PATCH 0/9] Variable size jump_label support
Date: Mon, 7 Oct 2019 12:45:09 -0400 [thread overview]
Message-ID: <20191007124509.72f9fd26@gandalf.local.home> (raw)
In-Reply-To: <20191007161302.GI4643@worktop.programming.kicks-ass.net>
On Mon, 7 Oct 2019 18:13:02 +0200
Peter Zijlstra <peterz@infradead.org> wrote:
> On Mon, Oct 07, 2019 at 11:17:42AM -0400, Steven Rostedt wrote:
> > Actually, even back then I said that it would be best to merge all the
> > tools into one (I just didn't have the time to implement it), and then
> > we could pull this off. I have one of my developers working to merge
> > record-mcount into objtool now (there's been some patches floating
> > around).
>
> Right, but while working on this I discovered GCC's -mrecord-mcount (and
> the kernel using this), so how much do we really still need the
> record-mcount tool?
That only works for some archs, not all of them. At least not yet that
I'm aware of.
>
> Do we really only need the tool for the little hole between gcc-4.6
> (minimal supported GCC version) and gcc-5 (when -mrecord-mcount was
> introduced) ?
Again, it's for more than just x86 ;-)
-- Steve
next prev parent reply other threads:[~2019-10-07 16:45 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20191007090225.441087116@infradead.org>
[not found] ` <20191007084443.793701281@infradead.org>
[not found] ` <20191007112229.GA3221@gmail.com>
2019-10-07 11:26 ` [RFC][PATCH 0/9] Variable size jump_label support Ingo Molnar
2019-10-07 15:17 ` Steven Rostedt
2019-10-07 16:13 ` Peter Zijlstra
2019-10-07 16:45 ` Steven Rostedt [this message]
2019-10-07 9:02 [RESEND] everything text-poke: ftrace, modules, static_call and jump_label Peter Zijlstra
2019-10-07 8:44 ` [RFC][PATCH 0/9] Variable size jump_label support Peter Zijlstra
2019-10-07 12:07 ` Peter Zijlstra
2019-10-07 12:55 ` Ingo Molnar
2019-10-07 15:08 ` Steven Rostedt
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