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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F8E8C433F5 for ; Sat, 16 Oct 2021 16:40:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 87DCC610D1 for ; Sat, 16 Oct 2021 16:40:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 87DCC610D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id 10F8E900002; Sat, 16 Oct 2021 12:40:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0BFF96B0072; Sat, 16 Oct 2021 12:40:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EEFF9900002; Sat, 16 Oct 2021 12:39:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0005.hostedemail.com [216.40.44.5]) by kanga.kvack.org (Postfix) with ESMTP id E0F706B0071 for ; Sat, 16 Oct 2021 12:39:59 -0400 (EDT) Received: from smtpin35.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 921D01802DDFB for ; Sat, 16 Oct 2021 16:39:59 +0000 (UTC) X-FDA: 78702862518.35.65F0CEE Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf17.hostedemail.com (Postfix) with ESMTP id 186DCF000394 for ; Sat, 16 Oct 2021 16:39:58 +0000 (UTC) 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> X-Stat-Signature: oojxnpjgkwuebqicwhnsqixhixyej3q4 Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b=RiRE9VN0; spf=none (imf17.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 186DCF000394 X-HE-Tag: 1634402398-745205 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 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 :-)