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 4A79CC433F5 for ; Mon, 1 Nov 2021 12:51:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D115360F70 for ; Mon, 1 Nov 2021 12:51:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D115360F70 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id D9844940012; Mon, 1 Nov 2021 08:50:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D470394000F; Mon, 1 Nov 2021 08:50:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C35F9940012; Mon, 1 Nov 2021 08:50:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0220.hostedemail.com [216.40.44.220]) by kanga.kvack.org (Postfix) with ESMTP id B4F5194000F for ; Mon, 1 Nov 2021 08:50:59 -0400 (EDT) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 795C01816F77E for ; Mon, 1 Nov 2021 12:50:59 +0000 (UTC) X-FDA: 78760346238.15.68DD606 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf15.hostedemail.com (Postfix) with ESMTP id 08F56D00009B for ; Mon, 1 Nov 2021 12:50:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=RL3hnt8gJU6frPUOEVXfNSSid9qg9EK1F0andJuRsYo=; b=PklqNkLpc8XThjjoH0WQp5PHjp 2P0kfCnLEMG73lnHd2wpZacv9Z0T6gd9jcv1KHpBh55JQBxZy3WKjvaSKGVRxPm7lxpw1wmTifrLF WeubHfJwD7K1qzjPZ0h2/0cKQ8A93IceSwN4QnBJdLlQOWOgO7nru9NYqtVE/OI9PV42yGYYMmLdq tO+2Rz8um+32jqjtFqQSnsk97MMI97giaV/eAmi2Ioe0uhmHAaFoO2pzBHvIBc+R8yWFzr5kMr+KE mY2g9prbvDtsYBHabFLAxx5w2GljEq6zAZE8SEv3DSLtCFDfW/zXix/UnxIcHi1L3i1zlPg/LOLG9 ZtD9luvA==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mhWgN-003lwE-9H; Mon, 01 Nov 2021 12:45:15 +0000 Date: Mon, 1 Nov 2021 12:44:59 +0000 From: Matthew Wilcox To: Yafang Shao Cc: akpm@linux-foundation.org, keescook@chromium.org, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, arnaldo.melo@gmail.com, pmladek@suse.com, peterz@infradead.org, viro@zeniv.linux.org.uk, valentin.schneider@arm.com, qiang.zhang@windriver.com, robdclark@chromium.org, christian@brauner.io, dietmar.eggemann@arm.com, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, davem@davemloft.net, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, dennis.dalessandro@cornelisnetworks.com, mike.marciniszyn@cornelisnetworks.com, dledford@redhat.com, jgg@ziepe.ca, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, oliver.sang@intel.com, lkp@intel.com Subject: Re: [PATCH v7 00/11] extend task comm from 16 to 24 Message-ID: References: <20211101060419.4682-1-laoar.shao@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211101060419.4682-1-laoar.shao@gmail.com> Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=PklqNkLp; dmarc=none; spf=none (imf15.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org X-Stat-Signature: piuc6a15s7wi1uu9o4hfkes7dwz4ui8m X-Rspamd-Queue-Id: 08F56D00009B X-Rspamd-Server: rspam01 X-HE-Tag: 1635771049-522978 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 Mon, Nov 01, 2021 at 06:04:08AM +0000, Yafang Shao wrote: > There're many truncated kthreads in the kernel, which may make trouble > for the user, for example, the user can't get detailed device > information from the task comm. > > This patchset tries to improve this problem fundamentally by extending > the task comm size from 16 to 24, which is a very simple way. It can't be that simple if we're on v7 and at 11 patches! It would be helpful if you included links to earlier postings. I can only find v5 and v6 in my inbox, so I fear I'm going to re-ask some questions which were already answered. Why can't we shorten the names of these kthreads? You didn't give any examples, so I can't suggest any possibilities.