Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp3509633pxb; Wed, 13 Oct 2021 07:27:08 -0700 (PDT) X-Google-Smtp-Source: ABdhPJyfpdSfKX/qTJUbv95FOi6i5j4hgcoBFZ4wMP+xJiGqbtDfm5pt2CRhJkpPm+z1IoPIxqLY X-Received: by 2002:a63:7d04:: with SMTP id y4mr28447694pgc.131.1634135228325; Wed, 13 Oct 2021 07:27:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634135228; cv=none; d=google.com; s=arc-20160816; b=ZAiZgxgnPPYwQMEx7XPBOAjQpoqjqJwNyazkWPyL3X7Zyfo3yfi2JvSxegXvnHyod5 IYOu5Xmc6072qq1W29deiEfa0FtLIU2bp4jsG/bn/F+ZVTNuySGrP/SYFshoisnshMuZ voTAyLKVJf8xdyTgRs2SVeFKKb87ucNv2sJZ9+eZlyko8ZUBVwDMmXin7LT25gowv6B2 qkjTeM90MIq9q9xk3WnY1+dQs3He4+krOjJXsQc83h9k8CUcGP2yvmBrpQdPz7Inc18L 5nfaAeU9/ko95mfO4hK4FXQznlc35w/qfT4d5bAchh0xQLb8SJtl2PMjwapJ7h+cfI3u 44dw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:subject:cc:to:from:date; bh=B+3JE6eHTzoYLtLiS3xCrZUflxZXtybtVUeGxFlf7LQ=; b=zZ4o328GYtW4ELWfVWoAWBJYKrzfM42Xfd+EIdxbfErOp4gMn41pOwqvFNMXvGKkgi bIIjh+3VMv2kyRhKYVQ0SYEoaTDiV/q/zetgpBmhlPMkgAaHVWuDeJXEisZYHAnOzdiR ijA9+6K1pZ5achhEWT+aVVwhzCv5eGnlS5jrdijTpzp961lT7TnmORthi2K6wd/RfAwc /vj4eARDRx859XKi6tJTuNm815taiBnbq5FiiE6L8Pn/KFgGPyy+j60wmL1ZLu0n6DQm lu2K8I5Z9i8425gjYrp5m3kAVFERbyxMXiOhLh/ywsHHQa3EvzpcWvnVTXsKbTx9YJfS Y6jg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id n11si13993005plc.412.2021.10.13.07.26.55; Wed, 13 Oct 2021 07:27:08 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235509AbhJMO0Y convert rfc822-to-8bit (ORCPT + 99 others); Wed, 13 Oct 2021 10:26:24 -0400 Received: from mail.kernel.org ([198.145.29.99]:42478 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236942AbhJMO0X (ORCPT ); Wed, 13 Oct 2021 10:26:23 -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 4C6F26101D; Wed, 13 Oct 2021 14:24:17 +0000 (UTC) Date: Wed, 13 Oct 2021 10:24:15 -0400 From: Steven Rostedt To: =?UTF-8?B?546L6LSH?= Cc: Miroslav Benes , Guo Ren , Ingo Molnar , "James E.J. Bottomley" , Helge Deller , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Paul Walmsley , Palmer Dabbelt , Albert Ou , Thomas Gleixner , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Josh Poimboeuf , Jiri Kosina , Petr Mladek , Joe Lawrence , Colin Ian King , Masami Hiramatsu , "Peter Zijlstra (Intel)" , Nicholas Piggin , Jisheng Zhang , linux-csky@vger.kernel.org, linux-kernel@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, live-patching@vger.kernel.org Subject: Re: [RESEND PATCH v2 1/2] ftrace: disable preemption between ftrace_test_recursion_trylock/unlock() Message-ID: <20211013102415.10788200@gandalf.local.home> In-Reply-To: <861d81d6-e202-09f3-f0be-6c77205f9d34@linux.alibaba.com> References: <75ee86ac-02f2-d687-ab1e-9c8c33032495@linux.alibaba.com> <861d81d6-e202-09f3-f0be-6c77205f9d34@linux.alibaba.com> 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=UTF-8 Content-Transfer-Encoding: 8BIT Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 13 Oct 2021 16:34:53 +0800 ηŽ‹θ΄‡ wrote: > On 2021/10/13 δΈ‹εˆ4:25, Miroslav Benes wrote: > >>> Side note... the comment will eventually conflict with peterz's > >>> https://lore.kernel.org/all/20210929152429.125997206@infradead.org/. > >> > >> Steven, would you like to share your opinion on this patch? > >> > >> If klp_synchronize_transition() will be removed anyway, the comments > >> will be meaningless and we can just drop it :-P > > > > The comment will still be needed in some form. We will handle it depending > > on what gets merged first. peterz's patches are not ready yet. > > Ok, then I'll move it before trylock() inside klp_ftrace_handler() anyway. +1 -- Steve