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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65D6FC433EF for ; Sat, 19 Feb 2022 10:05:33 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7C5D86B0071; Sat, 19 Feb 2022 05:05:32 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 74E5B6B0074; Sat, 19 Feb 2022 05:05:32 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5EFB06B0075; Sat, 19 Feb 2022 05:05:32 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0163.hostedemail.com [216.40.44.163]) by kanga.kvack.org (Postfix) with ESMTP id 4B7296B0071 for ; Sat, 19 Feb 2022 05:05:32 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id E8A09181A3488 for ; Sat, 19 Feb 2022 10:05:31 +0000 (UTC) X-FDA: 79159097262.28.EB6D28E Received: from lgeamrelo11.lge.com (lgeamrelo12.lge.com [156.147.23.52]) by imf06.hostedemail.com (Postfix) with ESMTP id 88784180002 for ; Sat, 19 Feb 2022 10:05:29 +0000 (UTC) Received: from unknown (HELO lgeamrelo02.lge.com) (156.147.1.126) by 156.147.23.52 with ESMTP; 19 Feb 2022 19:05:27 +0900 X-Original-SENDERIP: 156.147.1.126 X-Original-MAILFROM: byungchul.park@lge.com Received: from unknown (HELO X58A-UD3R) (10.177.244.38) by 156.147.1.126 with ESMTP; 19 Feb 2022 19:05:27 +0900 X-Original-SENDERIP: 10.177.244.38 X-Original-MAILFROM: byungchul.park@lge.com Date: Sat, 19 Feb 2022 19:05:19 +0900 From: Byungchul Park To: Matthew Wilcox Cc: Steven Rostedt , Theodore Ts'o , torvalds@linux-foundation.org, damien.lemoal@opensource.wdc.com, linux-ide@vger.kernel.org, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, mingo@redhat.com, linux-kernel@vger.kernel.org, peterz@infradead.org, will@kernel.org, tglx@linutronix.de, joel@joelfernandes.org, sashal@kernel.org, daniel.vetter@ffwll.ch, chris@chris-wilson.co.uk, duyuyang@gmail.com, johannes.berg@intel.com, tj@kernel.org, david@fromorbit.com, amir73il@gmail.com, bfields@fieldses.org, gregkh@linuxfoundation.org, kernel-team@lge.com, linux-mm@kvack.org, akpm@linux-foundation.org, mhocko@kernel.org, minchan@kernel.org, hannes@cmpxchg.org, vdavydov.dev@gmail.com, sj@kernel.org, jglisse@redhat.com, dennis@kernel.org, cl@linux.com, penberg@kernel.org, rientjes@google.com, vbabka@suse.cz, ngupta@vflare.org, linux-block@vger.kernel.org, axboe@kernel.dk, paolo.valente@linaro.org, josef@toxicpanda.com, linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk, jack@suse.cz, jack@suse.com, jlayton@kernel.org, dan.j.williams@intel.com, hch@infradead.org, djwong@kernel.org, dri-devel@lists.freedesktop.org, airlied@linux.ie, rodrigosiqueiramelo@gmail.com, melissa.srw@gmail.com, hamohammed.sa@gmail.com Subject: Re: [PATCH 00/16] DEPT(Dependency Tracker) Message-ID: <20220219100519.GB10342@X58A-UD3R> References: <1645095472-26530-1-git-send-email-byungchul.park@lge.com> <20220217120005.67f5ddf4@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Rspamd-Queue-Id: 88784180002 X-Stat-Signature: ydjspai6ncxjsseh6b6bc4grdny8ckug X-Rspam-User: Authentication-Results: imf06.hostedemail.com; dkim=none; dmarc=none; spf=pass (imf06.hostedemail.com: domain of byungchul.park@lge.com designates 156.147.23.52 as permitted sender) smtp.mailfrom=byungchul.park@lge.com X-Rspamd-Server: rspam03 X-HE-Tag: 1645265129-733057 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Feb 17, 2022 at 05:06:18PM +0000, Matthew Wilcox wrote: > On Thu, Feb 17, 2022 at 12:00:05PM -0500, Steven Rostedt wrote: > > On Thu, 17 Feb 2022 10:51:09 -0500 > > "Theodore Ts'o" wrote: > > > > > I know that you're trying to help us, but this tool needs to be far > > > better than Lockdep before we should think about merging it. Even if > > > it finds 5% more potential deadlocks, if it creates 95% more false > > > positive reports --- and the ones it finds are crazy things that > > > rarely actually happen in practice, are the costs worth the benefits? > > > And who is bearing the costs, and who is receiving the benefits? > > > > I personally believe that there's potential that this can be helpful and we > > will want to merge it. > > > > But, what I believe Ted is trying to say is, if you do not know if the > > report is a bug or not, please do not ask the maintainers to determine it > > for you. This is a good opportunity for you to look to see why your tool > > reported an issue, and learn that subsystem. Look at if this is really a > > bug or not, and investigate why. > > I agree with Steven here, to the point where I'm willing to invest some > time being a beta-tester for this, so if you focus your efforts on > filesystem/mm kinds of problems, I can continue looking at them and > tell you what's helpful and what's unhelpful in the reports. I appreciate your support. I'll do my best to make it *THE* perfect tool for that purpose. I'd feel great if it helps a lot and saves you guys' time in advance, it might not for now tho. Thanks, Byungchul