Received: by 2002:a05:6a10:5bc5:0:0:0:0 with SMTP id os5csp2616006pxb; Sun, 17 Oct 2021 20:36:30 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx1ltxcFYb2T1IB1yPaq+bGjhbb+904uyb4NPQ7JQx+B/2yL+mJx1Pajxpeg82T+PV1sgSm X-Received: by 2002:a17:90b:3b52:: with SMTP id ot18mr30621869pjb.245.1634528190003; Sun, 17 Oct 2021 20:36:30 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1634528189; cv=none; d=google.com; s=arc-20160816; b=ok1DrZN4LH5FzuGA3Vt6HBENToGouaqngR74yU7wcEyxqob6CLOVtt8myZDG173lrc NX5I4qd8lg9qjOMTyX9LNmRoat8m7O2GUUbI+1TzyBVwJSiQAX4UE4G5nrF7CTxgRc32 XBRoaK/zBh/MYvce5F+jTCzIqbuUDH8EVZDHSjWotXfVb6Cdu/IR2yFMIfnwLLLFgBPE TrWOb5+iGaaLt722gYBNZplKbaQCZv4vlWkZdBQVgxQ4akbeXDxui3GKyoCiMypEqxcX NThRfV+DgR28V3bpCO/0j39K5kWqQzJP0kNcW4QW1yQxxJFxnm+5qdaeHc0zQ5pDjnPZ WUNw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:in-reply-to:content-disposition:mime-version :references:message-id:subject:cc:to:from:date:dkim-signature; bh=m+/01TelQmBNfXwVuV7nEanECorZjkMuzOgfdURTYOY=; b=WLTXW+m+aB+EWWwt+QK8n8wDNVRNRvW34qWXUCrvzeXx5OGWqWMuUFjNlyAqTuZwOO sEYrKxzyUxaftsRCFNGEQFO8dqaD+y5sR7/alKYW8M0136mKrypkf+CU0TDSz0ORA/nr KYD806aNK8xnyIbIxwophroUENLd6Uu8YDsg2K3NjUjbncf2qNGM0ANcNDYFNwTyszPk SK+U5Ws0Umb9PuNdRjJHXMo3ON7v7wuJeckq9ykepWQDsfyMkX9kTu1DBfT37mzq3ceI sCDbfOkPkgl72JGmoUfxGQ5fIl0azPDz55jkf0Zkps1VWqKK54NWbbywlZPw6px09Cis FmMQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=RiRE9VN0; spf=pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id h10si277058plf.311.2021.10.17.20.36.17; Sun, 17 Oct 2021 20:36:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=casper.20170209 header.b=RiRE9VN0; spf=pass (google.com: domain of linux-ext4-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-ext4-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240854AbhJPQmK (ORCPT + 99 others); Sat, 16 Oct 2021 12:42:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36856 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232465AbhJPQmJ (ORCPT ); Sat, 16 Oct 2021 12:42:09 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3159C061570; Sat, 16 Oct 2021 09:40:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=m+/01TelQmBNfXwVuV7nEanECorZjkMuzOgfdURTYOY=; b=RiRE9VN0tHQNnKKD3WDLCfF35k Phk7aInITfjVIkSQvFG5WBTWm/unqkCV22YezdmuSKtqozr/taMnHwqUjEZrPFjQvQmIHY9n6HGVI NJMhYQTIc3vVguttckPiHomY80SABnb6NivaD4idfe7Lj3NHeG9YJSolkKBoTnMPUZ9KwzGAZFr4k PcJC+TDuVe3RJntjG7APQ99AQ9QJqSUIsy9ti9jNNq8FXSYLd1t7m7RXtx2szXlSjC5bzq/h1x4ba AIShMuky2bDx3M2Ssjj7llkdqYvP09vclZm9aOaYV7ukLdOZ6rtx4tRemA7HXBJMlQgsVaBNdwrVu UpKiUVgw==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbmiJ-009mGF-Tq; Sat, 16 Oct 2021 16:39:22 +0000 Date: Sat, 16 Oct 2021 17:39:15 +0100 From: Matthew Wilcox To: Jason Gunthorpe Cc: Dan Williams , Alex Sierra , Andrew Morton , "Kuehling, Felix" , Linux MM , Ralph Campbell , linux-ext4 , linux-xfs , amd-gfx list , Maling list - DRI developers , Christoph Hellwig , =?iso-8859-1?B?Suly9G1l?= Glisse , Alistair Popple , Vishal Verma , Dave Jiang , Linux NVDIMM Subject: Re: [PATCH v1 2/2] mm: remove extra ZONE_DEVICE struct page refcount Message-ID: References: <20211014153928.16805-1-alex.sierra@amd.com> <20211014153928.16805-3-alex.sierra@amd.com> <20211014170634.GV2744544@nvidia.com> <20211014230606.GZ2744544@nvidia.com> <20211016154450.GJ2744544@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211016154450.GJ2744544@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Sat, Oct 16, 2021 at 12:44:50PM -0300, Jason Gunthorpe wrote: > Assuming changing FSDAX is hard.. How would DAX people feel about just > deleting the PUD/PMD support until it can be done with compound pages? I think there are customers who would find that an unacceptable answer :-)