From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C97BC47404 for ; Mon, 7 Oct 2019 16:45:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 698FA20700 for ; Mon, 7 Oct 2019 16:45:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729114AbfJGQpO (ORCPT ); Mon, 7 Oct 2019 12:45:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:38476 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728530AbfJGQpN (ORCPT ); Mon, 7 Oct 2019 12:45:13 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5049C206BB; Mon, 7 Oct 2019 16:45:11 +0000 (UTC) Date: Mon, 7 Oct 2019 12:45:09 -0400 From: Steven Rostedt To: Peter Zijlstra Cc: Ingo Molnar , 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 , Borislav Petkov , Denys Vlasenko Subject: Re: [RFC][PATCH 0/9] Variable size jump_label support Message-ID: <20191007124509.72f9fd26@gandalf.local.home> In-Reply-To: <20191007161302.GI4643@worktop.programming.kicks-ass.net> References: <20191007090225.441087116@infradead.org> <20191007084443.793701281@infradead.org> <20191007112229.GA3221@gmail.com> <20191007112606.GA44864@gmail.com> <20191007111742.00d6c50b@gandalf.local.home> <20191007161302.GI4643@worktop.programming.kicks-ass.net> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 7 Oct 2019 18:13:02 +0200 Peter Zijlstra 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