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=-5.3 required=3.0 tests=BAYES_00, 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 85C2EC64E7B for ; Mon, 23 Nov 2020 12:31:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5709A20728 for ; Mon, 23 Nov 2020 12:31:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730863AbgKWMbb (ORCPT ); Mon, 23 Nov 2020 07:31:31 -0500 Received: from lgeamrelo11.lge.com ([156.147.23.51]:52125 "EHLO lgeamrelo11.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730829AbgKWMbO (ORCPT ); Mon, 23 Nov 2020 07:31:14 -0500 Received: from unknown (HELO lgemrelse6q.lge.com) (156.147.1.121) by 156.147.23.51 with ESMTP; 23 Nov 2020 21:31:12 +0900 X-Original-SENDERIP: 156.147.1.121 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO X58A-UD3R) (10.177.222.33) by 156.147.1.121 with ESMTP; 23 Nov 2020 21:31:12 +0900 X-Original-SENDERIP: 10.177.222.33 X-Original-MAILFROM: byungchul.park@lge.com Date: Mon, 23 Nov 2020 21:29:38 +0900 From: Byungchul Park To: torvalds@linux-foundation.org, peterz@infradead.org, mingo@redhat.com, will@kernel.org Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, rostedt@goodmis.org, joel@joelfernandes.org, alexander.levin@microsoft.com, daniel.vetter@ffwll.ch, chris@chris-wilson.co.uk, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, tytso@mit.edu, willy@infradead.org, david@fromorbit.com, amir73il@gmail.com, bfields@fieldses.org, gregkh@linuxfoundation.org, kernel-team@lge.com Subject: Re: [RFC] Dept(Dependency Tracker) Implementation Message-ID: <20201123122938.GA10265@X58A-UD3R> References: <20201111050559.GA24438@X58A-UD3R> <20201123110527.GB9464@X58A-UD3R> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201123110527.GB9464@X58A-UD3R> User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Nov 23, 2020 at 08:05:27PM +0900, Byungchul Park wrote: > Hi, > > This patchset is too nasty to get reviewed in detail for now. I worked Dept against mainline v5.9. Thanks, Byungchul > This have: > > 1. applying Dept to spinlock/mutex/rwlock/completion > 2. assigning custom keys or disable maps to avoid false positives > > This doesn't have yet (but will be done): > > 1. proc interfaces e.g. to see dependecies the tool has built, > 2. applying Dept to rw semaphore and the like, > 3. applying Dept to lock_page()/unlock_page(), > 4. assigning custom keys to more places properly, > 5. replace all manual Lockdep annotations, > (and so on..) > > But I decided to share it to let others able to test how it works and > someone who wants to see the detail able to check the code. The most > important thing I'd like to show is what exactly a deadlock detection > tool should do. > > Turn on CONFIG_DEPT to test it. Feel free to leave any questions if you > have. > > Thanks, > Byungchul