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 464C14594A for ; Tue, 2 Dec 2025 07:38:47 +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=1764661128; cv=none; b=UeNNeG6Vri5Jhdb4qBLNuFquCAYcax9ihxg9CoELuJZXfPg4Gxz4iErWAKJbsdgMu+WCW8wPMp3WroAWH5ALI7F0KvmudHj7dy0Ch1xFbTgKEu5F4QgToq7t+oUdWWjZnxCc/DpwlgBRWld24PXeKsvgqja+WziwGwapCLUvyeI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764661128; c=relaxed/simple; bh=Jq29UyC1YwZMttx9ZS/AX5toN/jTZuZKQiCqgS/4mD4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LGB0k+qBRfQj5FJyfaRAWdqaaBlh+w+k1r3Lonf3DjjmH9BA8sccvLCBWftecIMaNVM7DpwmytnGHPsp14p52qcmjpmu+DUxsg7Mbyx0dW9rkZcmDW7gkvWhFY6YOHaUdqP333YQPV1rYr77efEAiS3m0n+forkguPpBpxjkkvM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (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=YvTHuqKU; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (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="YvTHuqKU" 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=7Z+EpnbrdnH/9zuNKXII0c7YqwPXp2RQPhy7eJzzh08=; b=YvTHuqKUhbzZVSJAJqNgcMvduw SbUOj4vONtOdrMLo1CT7BqUBEOdG2+JE2eHipPjBjpvpZBdc+IqNyqhcAbCBszeYYZvAsDplPmlIu vC34LBjFWLS8IOav447nxQARnyl1yL8apE/lTWw8hnHJ2D2E9MVFF+RpCRR96aO1xuBaloZzs09Ag KKOpfXX8tRoEKpC+uDGEMqAiZa5YWGH2Esd38xWKfofq9QM9T7L+h0j/lfZ7sGXt4kIR93axTISuB v5gKM/jh+8VedBl8CqPpb6wS9jWwsEs00FFMGZzxj5uouqJir3r/AvY+UWD6N0ebCOnYHz7wAToat ptgt2JXw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vQKyE-00000004xqR-3HnS; Tue, 02 Dec 2025 07:38:46 +0000 Date: Mon, 1 Dec 2025 23:38:46 -0800 From: Christoph Hellwig To: "Darrick J. Wong" Cc: aalbersh@kernel.org, linux-xfs@vger.kernel.org Subject: Re: [PATCH 1/2] mkfs: enable new features by default Message-ID: References: <176463876373.839908.10273510618759502417.stgit@frogsfrogsfrogs> <176463876397.839908.4080899024281714980.stgit@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: <176463876397.839908.4080899024281714980.stgit@frogsfrogsfrogs> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Mon, Dec 01, 2025 at 05:28:16PM -0800, Darrick J. Wong wrote: > From: Darrick J. Wong > > Since the LTS is coming up, enable parent pointers and exchange-range by > default for all users. Also fix up an out of date comment. Do you have any numbers that show the overhead or non-overhead of enabling rmap? It will increase the amount of metadata written quite a bit.