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 D70C4C433F5 for ; Thu, 7 Oct 2021 17:25:48 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 79DB06109F for ; Thu, 7 Oct 2021 17:25:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 79DB06109F Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=suse.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 002416B006C; Thu, 7 Oct 2021 13:25:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id EF4606B0071; Thu, 7 Oct 2021 13:25:47 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DE33E900002; Thu, 7 Oct 2021 13:25:47 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id D01FE6B006C for ; Thu, 7 Oct 2021 13:25:47 -0400 (EDT) Received: from smtpin07.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 769CA1828001B for ; Thu, 7 Oct 2021 17:25:47 +0000 (UTC) X-FDA: 78670318734.07.CFBE889 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by imf20.hostedemail.com (Postfix) with ESMTP id 03E7ED0028A9 for ; Thu, 7 Oct 2021 17:25:46 +0000 (UTC) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id BAFCD2247A; Thu, 7 Oct 2021 17:25:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1633627545; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=qigBJImm0bI7q0YWtDDX1bgWmdo8dnSEw5xRqkvyw54=; b=lzQyM1TXf3BA7JOXjCgNiGFuBqNGMNaDLvya0jixOcY7gujlJVXiTTRi7amdPPfovQHF1C PHW34NOASRYNKlh5/bWSS4JLtWBPItIVyx921N5qoAz4swGIXRRMnCHzwAoUB7aJ8lIIUe e0n/qAiO6Cdr8gjHhqaWcefwuCSPpZk= Received: from suse.cz (unknown [10.100.201.86]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id CD616A3B81; Thu, 7 Oct 2021 17:25:44 +0000 (UTC) Date: Thu, 7 Oct 2021 19:25:41 +0200 From: Michal Hocko To: Suren Baghdasaryan Cc: David Hildenbrand , John Hubbard , Pavel Machek , Andrew Morton , Colin Cross , Sumit Semwal , Dave Hansen , Kees Cook , Matthew Wilcox , "Kirill A . Shutemov" , Vlastimil Babka , Johannes Weiner , Jonathan Corbet , Al Viro , Randy Dunlap , Kalesh Singh , Peter Xu , rppt@kernel.org, Peter Zijlstra , Catalin Marinas , vincenzo.frascino@arm.com, Chinwen Chang =?utf-8?B?KOW8temMpuaWhyk=?= , Axel Rasmussen , Andrea Arcangeli , Jann Horn , apopple@nvidia.com, Yu Zhao , Will Deacon , fenghua.yu@intel.com, thunder.leizhen@huawei.com, Hugh Dickins , feng.tang@intel.com, Jason Gunthorpe , Roman Gushchin , Thomas Gleixner , krisman@collabora.com, chris.hyser@oracle.com, Peter Collingbourne , "Eric W. Biederman" , Jens Axboe , legion@kernel.org, Rolf Eike Beer , Cyrill Gorcunov , Muchun Song , Viresh Kumar , Thomas Cedeno , sashal@kernel.org, cxfcosmos@gmail.com, Rasmus Villemoes , LKML , linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm , kernel-team Subject: Re: [PATCH v10 3/3] mm: add anonymous vma name refcounting Message-ID: References: <20211005200411.GB19804@duo.ucw.cz> <6b15c682-72eb-724d-bc43-36ae6b79b91a@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Authentication-Results: imf20.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=lzQyM1TX; spf=pass (imf20.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.28 as permitted sender) smtp.mailfrom=mhocko@suse.com; dmarc=pass (policy=quarantine) header.from=suse.com X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 03E7ED0028A9 X-Stat-Signature: deog4rb679w5e8d7n8s19n8ufshwj6jh X-HE-Tag: 1633627546-45347 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 07-10-21 09:43:14, Suren Baghdasaryan wrote: > On Thu, Oct 7, 2021 at 9:37 AM Michal Hocko wrote: [...] > > OK, so there is no real authority or any real naming convention. You > > just hope that applications will behave so that the consumer of those > > names can make proper calls. Correct? > > > > In that case the same applies to numbers and I do not see any strong > > argument for strings other than it is more pleasing to a human eye when > > reading the file. And that doesn't sound like a strong argument to make > > the kernel more complicated. Functionally both approaches are equal from > > a practical POV. > > I don't think that's correct. Names like [anon:.bss], > [anon:dalvik-zygote space] and > [anon:dalvik-/system/framework/boot-core-icu4j.art] provide user with > actionable information about the use of that memory or the allocator > using it. No, none of the above is really actionable without a common understanding. Both dalvik* are a complete gibberish to me. -- Michal Hocko SUSE Labs