From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 218FA1632DF for ; Thu, 20 Feb 2025 06:20:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740032455; cv=none; b=dZcCs8upvu7Z1/O7gvYzP3S1qd/Bb6bFnQKKN5xYgf58PAwm1wuglnvxL8XyCqSNEGI8BtTwpPIuyfCDbPySyz+jQHW7HuraOtT9Y/gvy3A8J7WynMcu2+TpPYxaZroIJaOqAH+jFy4iCyOyHFzQNuDHzso/9lEtBuMeFUXVWvI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740032455; c=relaxed/simple; bh=O5ozAggo11NIhu6XzSzMLwUqHUcyaHHocN3zlm+fYcg=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=rse9nrm33gVlHuAMn2UT1haWXhC7ud+X4vV95r91VMPbE74QmIeczV0JK8upEIzlGtNmccjFWm1ZG/+a9sQgt48Btb8hb7qqOKR6GrqNAX8LhmnRfA217EMwQIqG/e8qJR6JI67/uCObYWbMCbWACc6IaOuV2oFQwC6jnpEqe0Y= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=FCqZtAFe; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="FCqZtAFe" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; 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=DYehw8TM+WXhZ8yq4XPVzpXMeriV0Zfu3a/GY3T6WXc=; b=FCqZtAFelhfdc5QrbF5pxHrOEW A4VT7PmUvyMWU12GASHIdvX42gbZanavvmfERZSct1KhU3hbLq/VWaVfAA39AeZmQy59WgIhkWFrc BrbTYRiPqiVPNcWTTShmBLAndrQ8ZgJTWr23GVUSLj5669Xe/yCI8H9IXp9E74EhWOyULyUjf0nP9 NNxb8CXWa6xQV0c+JxHVmDWmT2vkfbtjtAcL2v4IGlakcgiTkMlRWz267hXxOZEEqce6eN0N4uT5H sNvvVgVGqN0G5Ke88YQhwbiGu3vRYLcJPOz8wVkHKF3HpX+jpNQc4vO7EhQKjDJ+Rm1v9lOBuhaZs ehlXpXtA==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1tkzvZ-0000000GvAx-312E; Thu, 20 Feb 2025 06:20:53 +0000 Date: Wed, 19 Feb 2025 22:20:53 -0800 From: Christoph Hellwig To: "Darrick J. Wong" Cc: Eric Sandeen , Christoph Hellwig , aalbersh@kernel.org, hch@lst.de, linux-xfs@vger.kernel.org Subject: Re: [PATCH 4/4] xfs_db: add command to copy directory trees out of filesystems Message-ID: References: <173888089597.2742734.4600497543125166516.stgit@frogsfrogsfrogs> <173888089664.2742734.11946589861684958797.stgit@frogsfrogsfrogs> <37ea5fed-c9ad-4731-9441-de50351a90d7@sandeen.net> <20250219183056.GR21808@frogsfrogsfrogs> Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250219183056.GR21808@frogsfrogsfrogs> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Wed, Feb 19, 2025 at 10:30:56AM -0800, Darrick J. Wong wrote: > If instead it turns out that 2037-era userspace (coughsystemdcough) > doesn't work on an old 2030 kernel, then they'll have to go install a > 2030-era userspace, boot the 2030 kernel, and migrate the data. Now > they have a V5 filesystem with 2030 era features. If they want 2037 era > features, they have to move the device to the new system and migrate a > second time. You probably wouldn't boot the old kernel on hardware but in a VM. Or have and old user mode Linux build around :)