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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2222BC433EF for ; Fri, 15 Oct 2021 17:35:44 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 56E5761184 for ; Fri, 15 Oct 2021 17:35:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 56E5761184 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=goodmis.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.ozlabs.org Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4HWD255GZrz3cHP for ; Sat, 16 Oct 2021 04:35:41 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=198.145.29.99; helo=mail.kernel.org; envelope-from=srs0=a1n/=pd=goodmis.org=rostedt@kernel.org; receiver=) Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4HWD1W6FfSz3c4y for ; Sat, 16 Oct 2021 04:35:11 +1100 (AEDT) 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 B4A2E61151; Fri, 15 Oct 2021 17:35:05 +0000 (UTC) Date: Fri, 15 Oct 2021 13:35:04 -0400 From: Steven Rostedt To: Peter Zijlstra Subject: Re: [PATCH] tracing: Have all levels of checks prevent recursion Message-ID: <20211015133504.6c0a9fcc@gandalf.local.home> In-Reply-To: <20211015161702.GF174703@worktop.programming.kicks-ass.net> References: <20211015110035.14813389@gandalf.local.home> <20211015161702.GF174703@worktop.programming.kicks-ass.net> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?B?546L6LSH?= , Paul Walmsley , "James E.J. Bottomley" , Paul Mackerras , Jisheng Zhang , "H. Peter Anvin" , live-patching@vger.kernel.org, linux-riscv@lists.infradead.org, Miroslav Benes , Joe Lawrence , Helge Deller , x86@kernel.org, linux-csky@vger.kernel.org, Ingo Molnar , Petr Mladek , Albert Ou , Jiri Kosina , Nicholas Piggin , Borislav Petkov , Josh Poimboeuf , Thomas Gleixner , linux-parisc@vger.kernel.org, LKML , Palmer Dabbelt , Masami Hiramatsu , Guo Ren , Colin Ian King , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, 15 Oct 2021 18:17:02 +0200 Peter Zijlstra wrote: > On Fri, Oct 15, 2021 at 11:00:35AM -0400, Steven Rostedt wrote: > > From: "Steven Rostedt (VMware)" > > > > While writing an email explaining the "bit = 0" logic for a discussion on > > > bit = trace_get_context_bit() + start; > > While there, you were also going to update that function to match/use > get_recursion_context(). Because your version is still branch hell. That would probably be a separate patch. This is just a fix to a design flaw, changing the context tests would be performance enhancement. Thanks for the reminder (as it was on my todo list to update that code). -- Steve