From patchwork Mon Oct 12 18:38:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marcos Paulo de Souza X-Patchwork-Id: 11833639 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 749E5174A for ; Mon, 12 Oct 2020 19:06:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 36170214DB for ; Mon, 12 Oct 2020 19:06:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=mpdesouza.com header.i=@mpdesouza.com header.b="IAf6Xvmk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389479AbgJLTGx (ORCPT ); Mon, 12 Oct 2020 15:06:53 -0400 Received: from gateway31.websitewelcome.com ([192.185.144.219]:31918 "EHLO gateway31.websitewelcome.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390989AbgJLTEF (ORCPT ); Mon, 12 Oct 2020 15:04:05 -0400 X-Greylist: delayed 1491 seconds by postgrey-1.27 at vger.kernel.org; Mon, 12 Oct 2020 15:04:05 EDT Received: from cm14.websitewelcome.com (cm14.websitewelcome.com [100.42.49.7]) by gateway31.websitewelcome.com (Postfix) with ESMTP id 83AFD5581ED for ; Mon, 12 Oct 2020 13:39:10 -0500 (CDT) Received: from br540.hostgator.com.br ([108.179.252.180]) by cmsmtp with SMTP id S2j0kvxy4BD8bS2j0kwKu9; Mon, 12 Oct 2020 13:39:10 -0500 X-Authority-Reason: nr=8 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mpdesouza.com; s=default; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:In-Reply-To:References:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=AyOQCiEK6JvLpTjMnuQQuorSuP+b+4HAHFHt4S9ALRY=; b=IAf6Xvmkp11uKd1z8coqYj8dtw x4v7gfzy160MSIjLlmYTlUBzRH+MQOhGfSJBdU2dnZgqar51RGYVlc+LeNqC52BOsjKlZiKHksGuV +YneWOJACAGxBHd6ofOie4US5z3NDJd/4gWNYw1H2mZrUYbku0jyLd+TMc04YexZoV2RxvluN7CEA mwzTTJ9GYDgQ4jQiLN9Mmhj9uvp/kvSj9Z/ALh/wDKRsbmBlghLIlXcfXPZoZhKaQI9dKxq5hBgOO Ura5m1lkt5gJYpVjhJa6hHJbJSavsXrtOQDkBWT5KXjxPvwXvM3xsws6ZJ5QxL+EDgCFhNWsfZYwz RAIZPN6Q==; Received: from [179.185.211.118] (port=60218 helo=localhost.localdomain) by br540.hostgator.com.br with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1kS2iz-000ePt-VY; Mon, 12 Oct 2020 15:39:10 -0300 From: Marcos Paulo de Souza To: dsterba@suse.com, linux-btrfs@vger.kernel.org Cc: Marcos Paulo de Souza Subject: [PATCH] btrfs-progs: docs: Clarify maximum block group size at mkfs time Date: Mon, 12 Oct 2020 15:38:44 -0300 Message-Id: <20201012183844.20593-1-marcos@mpdesouza.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - br540.hostgator.com.br X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - mpdesouza.com X-BWhitelist: no X-Source-IP: 179.185.211.118 X-Source-L: No X-Exim-ID: 1kS2iz-000ePt-VY X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (localhost.localdomain) [179.185.211.118]:60218 X-Source-Auth: marcos@mpdesouza.com X-Email-Count: 2 X-Source-Cap: bXBkZXNvNTM7bXBkZXNvNTM7YnI1NDAuaG9zdGdhdG9yLmNvbS5icg== X-Local-Domain: yes Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org From: Marcos Paulo de Souza A block group size cannot be larger than 10% of the total filesystem size. Signed-off-by: Marcos Paulo de Souza --- Documentation/mkfs.btrfs.asciidoc | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/mkfs.btrfs.asciidoc b/Documentation/mkfs.btrfs.asciidoc index 630f575c..f2866523 100644 --- a/Documentation/mkfs.btrfs.asciidoc +++ b/Documentation/mkfs.btrfs.asciidoc @@ -284,6 +284,8 @@ sometimes the terms are used interchangeably A typical size of metadata block group is 256MiB (filesystem smaller than 50GiB) and 1GiB (larger than 50GiB), for data it's 1GiB. The system block group size is a few megabytes. ++ +For smaller filesystems, the block group size is limited to 10% of the filesystem size. *RAID*:: a block group profile type that utilizes RAID-like features on multiple