Received: by 2002:a05:6a10:1d13:0:0:0:0 with SMTP id pp19csp2518084pxb; Tue, 24 Aug 2021 00:36:23 -0700 (PDT) X-Google-Smtp-Source: ABdhPJynzBM7r40dmXvMjiTaPmQQzixcC46eiToBXuX6MZterkCfdW0ltK2Lvx3656js1Wn51YIs X-Received: by 2002:a92:d10d:: with SMTP id a13mr26775837ilb.87.1629790583285; Tue, 24 Aug 2021 00:36:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1629790583; cv=none; d=google.com; s=arc-20160816; b=ufk24ObIo3LhWQG5tQRuvHUSjkkWGU19MZYCzt0HG9uQJu/yT/Ttgcc7dDwob5I39B MtfgmfcS+zSFHFkMl7fF0hDVVyMRoB8Bz2Ynbs5IsV+gjiGJqYpyMEOpG4UvP+ytx4/6 7ye0x5W3o0f9XkixpIjDpZ7qIr5Z2TB5b5WcSl5heZLakrv9048ccEfvlXYMq2SX+tCb x0pvMlNjRVucHw30QAe928wAoB7xHn9x4Tem3r+Le/UMqdNCpnlfWIKOM2vUWl1VXLOv 3VXYOw7Qb2m2nbx2ycHMKy2+sP/R+cdh5xMcZlwwg2KDo2aahxA+CfzZSik4UCLPtSit 2n6w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:user-agent:in-reply-to:content-transfer-encoding :content-disposition:mime-version:references:message-id:subject:cc :to:from:date; bh=gehM2WKxHH1B4AL/C/4lL1kYrNjdeny73C8bGJxG9UY=; b=xrn8DoraVNJfWQIjEM/l4qeBxDXtRuy60vZlPnq+e6zGHajyn0l9lO3LFte1QldVPA L0Wmuw9C9nP8Whfcl3kbguFqtfPyunc2zt2SNcSLiFdroKhNhA0mHbMTwWhO01/8geV6 MCwzTTPszcTdXHPj3otXUmWjlnS5crm0Yj1RHeD8DHaOagN7vtYVHVMmIRh4MnPL72IQ LHRnNzqJl/fHQAijXZTKWdGZCjhnIkasj5zEMBcc+NPs3CVa25ck4j0DYQ5fEOx7exso OCSr/7bKXlecgw9fQNVXjy/X/U0kqYizuZje6rZauDX8fT9ddBcHvSGDQhQ5+txWIiaG cVbw== ARC-Authentication-Results: i=1; mx.google.com; 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 d8si4436372ilr.109.2021.08.24.00.36.08; Tue, 24 Aug 2021 00:36:23 -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; 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 S234962AbhHXHfG (ORCPT + 99 others); Tue, 24 Aug 2021 03:35:06 -0400 Received: from verein.lst.de ([213.95.11.211]:50571 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234817AbhHXHfE (ORCPT ); Tue, 24 Aug 2021 03:35:04 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id 1B37B67373; Tue, 24 Aug 2021 09:34:19 +0200 (CEST) Date: Tue, 24 Aug 2021 09:34:18 +0200 From: Christoph Hellwig To: Gabriel Krisman Bertazi Cc: Christoph Hellwig , Shreeya Patel , linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net Subject: Re: [PATCH 05/11] unicode: pass a UNICODE_AGE() tripple to utf8_load Message-ID: <20210824073418.GA25209@lst.de> References: <20210818140651.17181-1-hch@lst.de> <20210818140651.17181-6-hch@lst.de> <87tujg19wj.fsf@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <87tujg19wj.fsf@collabora.com> User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org On Mon, Aug 23, 2021 at 11:02:52AM -0400, Gabriel Krisman Bertazi wrote: > I remember this fallback was specifically requested during a review or > in a discussion, but I honestly cannot remember the reason. > > One advantage I can think is if we have a filesystem that requires a > newer unicode version than the current kernel has, and strict mode flag > is set, we can fallback to the latest version and still mount the fs > read/write. Well, that seems a little pointless. If we add such a file system we can just upgrade the unÑ–code data files. (FYI, I did an upgrade to 1.13 to test this series, but without any file system that needs it I did not bother to submit the patch).