From patchwork Wed Sep 15 17:22:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Sandeen X-Patchwork-Id: 12496989 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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=no 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 C8792C433F5 for ; Wed, 15 Sep 2021 17:23:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B4C0161186 for ; Wed, 15 Sep 2021 17:23:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230259AbhIORYY (ORCPT ); Wed, 15 Sep 2021 13:24:24 -0400 Received: from sandeen.net ([63.231.237.45]:33372 "EHLO sandeen.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229893AbhIORYY (ORCPT ); Wed, 15 Sep 2021 13:24:24 -0400 Received: by sandeen.net (Postfix, from userid 500) id 543AC85B; Wed, 15 Sep 2021 12:22:53 -0500 (CDT) From: Eric Sandeen To: linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: dan.j.williams@intel.com Subject: [PATCH 0/3 RFC] Remove DAX experimental warnings Date: Wed, 15 Sep 2021 12:22:38 -0500 Message-Id: <1631726561-16358-1-git-send-email-sandeen@redhat.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org For six years now, when mounting xfs, ext4, or ext2 with dax, the drivers have logged "DAX enabled. Warning: EXPERIMENTAL, use at your own risk." IIRC, dchinner added this to the original XFS patchset, and Dan Williams followed suit for ext4 and ext2. After brief conversations with some ext4 and xfs developers and maintainers, it seems that it may be time to consider removing this warning. For XFS, we had been holding out for reflink+dax capability, but proposals which had seemed promising now appear to be indefinitely stalled, and I think we might want to consider that dax-without-reflink is no longer EXPERIMENTAL, while dax-with-reflink is simply an unimplemented future feature. For EXT4/EXT2, I'm not aware of significant outstanding concerns that would continue to require the dire warning. Thoughts? Thanks, -Eric