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=-8.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 52FA8C4727D for ; Sat, 26 Sep 2020 02:22:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17B392087D for ; Sat, 26 Sep 2020 02:22:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601086959; bh=yONBZOLFobn/XfNSqbInd73Y3EF/XNd7uGysPjXX+BA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=qygz4wbnDr2PuDyHdLkt3gDlbKDb8UQd3uQKf4D2JaLny2uRcidAE1yluqzUbkg6i kFiI3WM4TWnLOR1cDr/IxtkD2/+QVXKgEIGTq/Uh/Al/2XWeKpwTEguuTowXSTRxOF L97Xi2nLBCsNwXrdar9mlATON2tqN1iX9B9aenpk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729950AbgIZCWf (ORCPT ); Fri, 25 Sep 2020 22:22:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:47820 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729894AbgIZCWf (ORCPT ); Fri, 25 Sep 2020 22:22:35 -0400 Received: from X1 (unknown [104.245.68.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D3A5120866; Sat, 26 Sep 2020 02:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1601086955; bh=yONBZOLFobn/XfNSqbInd73Y3EF/XNd7uGysPjXX+BA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=TK19VAMIz0cAxC09t8GSQfxw5Vbk8/p15wK/uEoNz2F4UaGxxlh6VJwIdrfeD7wfN 3RE94dfL12JijaAtruhBkmaewy50WEfL9Dpgn/Quk90C5ZbIiq563PKwsHz6PnUdip 9oNuqX1UJ8gC0F9Dk7JkdXMqZEcbuNlaZ6RsFGxs= Date: Fri, 25 Sep 2020 19:22:34 -0700 From: Andrew Morton To: Dan Williams Cc: Joao Martins , vishal.l.verma@intel.com, dave.hansen@linux.intel.com, linux-mm@kvack.org, linux-nvdimm@lists.01.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 15/17] device-dax: add an 'align' attribute Message-Id: <20200925192234.33ae92b75012c1f2bdd974b8@linux-foundation.org> In-Reply-To: <160106118486.30709.13012322227204800596.stgit@dwillia2-desk3.amr.corp.intel.com> References: <160106109960.30709.7379926726669669398.stgit@dwillia2-desk3.amr.corp.intel.com> <160106118486.30709.13012322227204800596.stgit@dwillia2-desk3.amr.corp.intel.com> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.32; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 25 Sep 2020 12:13:04 -0700 Dan Williams wrote: > Introduce a device align attribute. While doing so, rename the region > align attribute to be more explicitly named as so, but keep it named as > @align to retain the API for tools like daxctl. > > Changes on align may not always be valid, when say certain mappings were > created with 2M and then we switch to 1G. So, we validate all ranges > against the new value being attempted, post resizing. > > Link: https://lkml.kernel.org/r/159643105944.4062302.3131761052969132784.stgit@dwillia2-desk3.amr.corp.intel.com > Link: https://lore.kernel.org/r/20200716172913.19658-3-joao.m.martins@oracle.com > Signed-off-by: Joao Martins > Signed-off-by: Dan Williams > The signoff chain implies that this was From:Joao. Please clarify?