From patchwork Thu Oct 24 15:44:53 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johannes Thumshirn X-Patchwork-Id: 11210111 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 6783D14ED for ; Thu, 24 Oct 2019 15:45:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F20220650 for ; Thu, 24 Oct 2019 15:45:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2409741AbfJXPpA (ORCPT ); Thu, 24 Oct 2019 11:45:00 -0400 Received: from mx2.suse.de ([195.135.220.15]:49994 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S2406101AbfJXPo7 (ORCPT ); Thu, 24 Oct 2019 11:44:59 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 54A94B36A; Thu, 24 Oct 2019 15:44:58 +0000 (UTC) From: Johannes Thumshirn To: David Sterba Cc: Linux BTRFS Mailinglist , Johannes Thumshirn Subject: [PATCH 0/2] Provide an estimation of (free/total) inodes in statfs Date: Thu, 24 Oct 2019 17:44:53 +0200 Message-Id: <20191024154455.19370-1-jthumshirn@suse.de> X-Mailer: git-send-email 2.16.4 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org There is a user report on the BeeGFS mailing list, that it's impossible to run BeeGFS on top of BTRFS. This is because BeeGFS is storing it's meta-data either in the underlying file-systems extended attributes or directly in an inode if it can make use of inline inodes. A more detailed description is in patch 2/2. Without the patch applied: rapido1:/# df -hTi /mnt/test Filesystem Type Inodes IUsed IFree IUse% Mounted on /mnt/test btrfs 0 0 0 - /mnt/test With the patch applied on an empty fs: rapido1:/# df -hTi /mnt/test Filesystem Type Inodes IUsed IFree IUse% Mounted on /dev/zram0 btrfs 1.6K 0 1.6K 0% /mnt/test With the patch applied on a dirty fs: rapido1:/# df -hTi /mnt/test Filesystem Type Inodes IUsed IFree IUse% Mounted on /dev/zram0 btrfs 1.6K 1.5K 197 88% /mnt/test Johannes Thumshirn (2): btrfs: remove cached space_info in btrfs_statfs() btrfs: provide an estimated number of inodes for statfs fs/btrfs/super.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)