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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 D15B4C4338F for ; Wed, 25 Aug 2021 15:09:29 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 66B11610D1 for ; Wed, 25 Aug 2021 15:09:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 66B11610D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mit.edu Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 056736B0071; Wed, 25 Aug 2021 11:09:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0076D8D0002; Wed, 25 Aug 2021 11:09:28 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E37878D0001; Wed, 25 Aug 2021 11:09:28 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0004.hostedemail.com [216.40.44.4]) by kanga.kvack.org (Postfix) with ESMTP id C997E6B0071 for ; Wed, 25 Aug 2021 11:09:28 -0400 (EDT) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 6C2831B41A for ; Wed, 25 Aug 2021 15:09:28 +0000 (UTC) X-FDA: 78513936816.28.013C4A4 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) by imf22.hostedemail.com (Postfix) with ESMTP id 03C641901 for ; Wed, 25 Aug 2021 15:09:27 +0000 (UTC) Received: from cwcc.thunk.org (pool-72-74-133-215.bstnma.fios.verizon.net [72.74.133.215]) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 17PF9MnV029505 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 25 Aug 2021 11:09:23 -0400 Received: by cwcc.thunk.org (Postfix, from userid 15806) id 6834A15C3DBB; Wed, 25 Aug 2021 11:09:22 -0400 (EDT) Date: Wed, 25 Aug 2021 11:09:22 -0400 From: "Theodore Ts'o" To: Alex Sierra Cc: akpm@linux-foundation.org, Felix.Kuehling@amd.com, linux-mm@kvack.org, rcampbell@nvidia.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, hch@lst.de, jgg@nvidia.com, jglisse@redhat.com Subject: Re: [PATCH v1 01/14] ext4/xfs: add page refcount helper Message-ID: References: <20210825034828.12927-1-alex.sierra@amd.com> <20210825034828.12927-2-alex.sierra@amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210825034828.12927-2-alex.sierra@amd.com> Authentication-Results: imf22.hostedemail.com; dkim=none; dmarc=none; spf=none (imf22.hostedemail.com: domain of tytso@mit.edu has no SPF policy when checking 18.9.28.11) smtp.mailfrom=tytso@mit.edu X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 03C641901 X-Stat-Signature: ppy3g6i45ikq1di514ihu11p4b9znj3z X-HE-Tag: 1629904167-961204 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 Tue, Aug 24, 2021 at 10:48:15PM -0500, Alex Sierra wrote: > From: Ralph Campbell > > There are several places where ZONE_DEVICE struct pages assume a reference > count == 1 means the page is idle and free. Instead of open coding this, > add a helper function to hide this detail. > > Signed-off-by: Ralph Campbell > Signed-off-by: Alex Sierra > Reviewed-by: Christoph Hellwig Acked-by: Theodore Ts'o