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=-7.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, USER_AGENT_SANE_1 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 7AF42C54FCB for ; Thu, 23 Apr 2020 16:25:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 567CC20704 for ; Thu, 23 Apr 2020 16:25:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="QamyleUi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729446AbgDWQZK (ORCPT ); Thu, 23 Apr 2020 12:25:10 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:45440 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729407AbgDWQZK (ORCPT ); Thu, 23 Apr 2020 12:25:10 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 03NGMVAG164757; Thu, 23 Apr 2020 16:25:09 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2020-01-29; bh=Akak30jo9YMEXXT4hTCrySYkhktam6kTf/0xIMhzRik=; b=QamyleUieBzVQgIOAWZc8JSFfsP1V+jRbq/yZO573QfDjAKYhrywZmylOfxZto5eGSZK sfRNG4t01puuzVy82/InOvQ+jTvx1g9NXTRpSp26KhgMa7X5XA6e+/1NTu5AWPOjeIvx gzhafzM8n7JeNXMvrVLn+EQ+y35lqLTdawee9gWDQnrzEs5n+Pya2GXHHCkAjE5cwOkq 12JsVfHA/EfwkSNi/RrTRb3OEh3PqQUOjMHJHdtFqKY06ptXs8HHmIPgUogvE4BcaxtX APnYWX6AUinaEY0jLByJ8uDdxOLr+dqf7pSiPLiJX/g6TNxyb+pVKsvfg3tbV8ZLwoCj Lw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 30jvq4vkhk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Apr 2020 16:25:09 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 03NGMest035012; Thu, 23 Apr 2020 16:23:08 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 30gbbmg5nq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 23 Apr 2020 16:23:08 +0000 Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 03NGN8hE031382; Thu, 23 Apr 2020 16:23:08 GMT Received: from localhost (/67.169.218.210) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 23 Apr 2020 09:23:08 -0700 Date: Thu, 23 Apr 2020 09:23:06 -0700 From: "Darrick J. Wong" To: Amir Goldstein Cc: xfs Subject: Re: [XFS SUMMIT] 64bit timestamps Message-ID: <20200423162306.GL6742@magnolia> References: <20200422230307.GH6742@magnolia> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9600 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 malwarescore=0 suspectscore=0 mlxlogscore=999 adultscore=0 mlxscore=0 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004230126 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9600 signatures=668686 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 adultscore=0 mlxlogscore=999 phishscore=0 impostorscore=0 clxscore=1015 bulkscore=0 spamscore=0 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2004230126 Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org On Thu, Apr 23, 2020 at 09:23:51AM +0300, Amir Goldstein wrote: > On Thu, Apr 23, 2020 at 2:03 AM Darrick J. Wong wrote: > > > > Hi all, > > > > Here's a thread to talk about the remainder of 64-bit timestamp support > > on XFS. I have a series[1] that redefines the inode timestamps to be > > 64-bit nanosecond counters and decreases the accuracy of the ondisk > > quota timers to 4s so that both will last until 2446. > > > > --D > > > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/log/?h=bigtime > > This looks great. > > What's the plan w.r.t. enabling bigtime on existing fs? > In the end, it is just a administrative flag saying "point of no return". > Everyone do realize that fixing y2038 by requiring to reformat > existing filesystems is unacceptable for most of the deployments out there, > right? Ah, right, I neglected to post a link to the userspace counterpart: https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfsprogs-dev.git/log/?h=bigtime xfs_admin will be able to flip on the feature flag, after which the kernel will start upgrading files to use the bigtime format. --D > Thanks, > Amir.