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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT 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 3F534ECDFD0 for ; Fri, 14 Sep 2018 13:14:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E1B6A206B2 for ; Fri, 14 Sep 2018 13:14:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E1B6A206B2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728012AbeINS2o (ORCPT ); Fri, 14 Sep 2018 14:28:44 -0400 Received: from verein.lst.de ([213.95.11.211]:57706 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727013AbeINS2o (ORCPT ); Fri, 14 Sep 2018 14:28:44 -0400 Received: by newverein.lst.de (Postfix, from userid 2407) id C23F468C8A; Fri, 14 Sep 2018 15:14:20 +0200 (CEST) Date: Fri, 14 Sep 2018 15:14:20 +0200 From: Christoph Hellwig To: Dan Williams Cc: akpm@linux-foundation.org, Christoph Hellwig , =?iso-8859-1?B?Suly9G1l?= Glisse , Logan Gunthorpe , alexander.h.duyck@intel.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 2/7] mm, devm_memremap_pages: Kill mapping "System RAM" support Message-ID: <20180914131420.GC27141@lst.de> References: <153680531988.453305.8080706591516037706.stgit@dwillia2-desk3.amr.corp.intel.com> <153680533172.453305.5701902165148172434.stgit@dwillia2-desk3.amr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <153680533172.453305.5701902165148172434.stgit@dwillia2-desk3.amr.corp.intel.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 12, 2018 at 07:22:11PM -0700, Dan Williams wrote: > Given the fact that devm_memremap_pages() requires a percpu_ref that is > torn down by devm_memremap_pages_release() the current support for > mapping RAM is broken. I agree. Do you remember why we even added it in the first place? Signed-off-by: Christoph Hellwig