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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 ECF91C3A589 for ; Tue, 20 Aug 2019 08:54:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C917C22DBF for ; Tue, 20 Aug 2019 08:54:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729502AbfHTIyL (ORCPT ); Tue, 20 Aug 2019 04:54:11 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:51160 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728842AbfHTIyL (ORCPT ); Tue, 20 Aug 2019 04:54:11 -0400 Received: from p5de0b6c5.dip0.t-ipconnect.de ([93.224.182.197] helo=nanos) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1hzzth-0007eD-0p; Tue, 20 Aug 2019 10:53:45 +0200 Date: Tue, 20 Aug 2019 10:53:43 +0200 (CEST) From: Thomas Gleixner To: Jisheng Zhang cc: Catalin Marinas , Jonathan Corbet , Will Deacon , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , "x86@kernel.org" , "Naveen N. Rao" , Anil S Keshavamurthy , "David S. Miller" , Masami Hiramatsu , "linux-doc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" Subject: Re: [PATCH v2 3/3] arm64: implement KPROBES_ON_FTRACE In-Reply-To: <20190820114314.685a3239@xhacker.debian> Message-ID: References: <20190820113928.1971900c@xhacker.debian> <20190820114314.685a3239@xhacker.debian> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 20 Aug 2019, Jisheng Zhang wrote: > KPROBES_ON_FTRACE avoids much of the overhead with regular kprobes as it > eliminates the need for a trap, as well as the need to emulate or > single-step instructions. > > This patch implements KPROBES_ON_FTRACE for arm64. git grep 'This patch' Documentation/process/submitting-patches.rst Thanks, tglx