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=-9.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 43F3AC4363A for ; Mon, 5 Oct 2020 16:29:10 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 8E6F52075A for ; Mon, 5 Oct 2020 16:29:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="W6dT2vN9" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8E6F52075A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BA4EE6B009B; Mon, 5 Oct 2020 12:29:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B552E6B009C; Mon, 5 Oct 2020 12:29:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A1CC58E0001; Mon, 5 Oct 2020 12:29:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0090.hostedemail.com [216.40.44.90]) by kanga.kvack.org (Postfix) with ESMTP id 768E56B009B for ; Mon, 5 Oct 2020 12:29:08 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 08F97180AD801 for ; Mon, 5 Oct 2020 16:29:08 +0000 (UTC) X-FDA: 77338406376.29.slope99_0805f25271bf Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin29.hostedemail.com (Postfix) with ESMTP id B23AC180868CE for ; Mon, 5 Oct 2020 16:29:07 +0000 (UTC) X-HE-Tag: slope99_0805f25271bf X-Filterd-Recvd-Size: 3315 Received: from hqnvemgate25.nvidia.com (hqnvemgate25.nvidia.com [216.228.121.64]) by imf11.hostedemail.com (Postfix) with ESMTP for ; Mon, 5 Oct 2020 16:29:06 +0000 (UTC) Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate25.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Mon, 05 Oct 2020 09:28:11 -0700 Received: from rcampbell-dev.nvidia.com (172.20.13.39) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 5 Oct 2020 16:29:05 +0000 Subject: Re: [RFC PATCH v3 1/2] ext4/xfs: add page refcount helper To: Christoph Hellwig CC: , , , , Dan Williams , Ira Weiny , Matthew Wilcox , Jerome Glisse , John Hubbard , Alistair Popple , Jason Gunthorpe , Bharata B Rao , Zi Yan , "Kirill A . Shutemov" , Yang Shi , Paul Mackerras , Ben Skeggs , Andrew Morton References: <20201001181715.17416-1-rcampbell@nvidia.com> <20201001181715.17416-2-rcampbell@nvidia.com> <20201002055627.GA8891@lst.de> X-Nvconfidentiality: public From: Ralph Campbell Message-ID: <2789432c-e3b2-e3f4-1904-c96f03ea9c2a@nvidia.com> Date: Mon, 5 Oct 2020 09:29:04 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20201002055627.GA8891@lst.de> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1601915291; bh=r9u8GXqftmRJy6EtN3cah6v+xD2lZJO4Ups13dnHtFk=; h=Subject:To:CC:References:X-Nvconfidentiality:From:Message-ID:Date: User-Agent:MIME-Version:In-Reply-To:Content-Type:Content-Language: Content-Transfer-Encoding:X-Originating-IP:X-ClientProxiedBy; b=W6dT2vN9G+XROLp0BSTe855+S4z08HJa3Gfh0W6r0EKEq7vB8Jay6CRRfwcHtuXIV 2o1YotZGXN+vg+kCc/KhuaYs27wWp6YGSyLuE/N7aVfn0JPCTweWnDR/yXR2s0hvna nfTBMUxKO63a04ZJvvJofytj4zqZ6oSBkQ23/cqTQazVfJBr8M3LPP22wkc4NihHJW kk8qK2PQnJjcZUrZ+0aFnklh9zRZEPG5qnNhwFjAm9hk7GNvjNM7NfRsLfaJvIEP9p 8vssxx+uVESJYNYHFhYea8xGw9/17BMUVyDYNLXgElPUOKCAxR75lxpOUQlst6oZf6 V61ahFjm77LGQ== 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 10/1/20 10:56 PM, Christoph Hellwig wrote: > On Thu, Oct 01, 2020 at 11:17:14AM -0700, Ralph Campbell wrote: >> 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 > > Looks good: > > Reviewed-by: Christoph Hellwig > Thanks for the review. I'll resend this as an independent patch.