Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932327AbVLAQli (ORCPT ); Thu, 1 Dec 2005 11:41:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932329AbVLAQli (ORCPT ); Thu, 1 Dec 2005 11:41:38 -0500 Received: from gold.veritas.com ([143.127.12.110]:52888 "EHLO gold.veritas.com") by vger.kernel.org with ESMTP id S932327AbVLAQlh (ORCPT ); Thu, 1 Dec 2005 11:41:37 -0500 Date: Thu, 1 Dec 2005 16:41:15 +0000 (GMT) From: Hugh Dickins X-X-Sender: hugh@goblin.wat.veritas.com To: Christopher Friesen cc: linux-kernel@vger.kernel.org Subject: Re: discrepency between "df" and "du" on tmpfs filesystem? In-Reply-To: <438F179E.5040402@nortel.com> Message-ID: References: <438F179E.5040402@nortel.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-OriginalArrivalTime: 01 Dec 2005 16:41:09.0260 (UTC) FILETIME=[082CACC0:01C5F696] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 920 Lines: 25 On Thu, 1 Dec 2005, Christopher Friesen wrote: > > Someone noticed this on one of our machines. The rootfs is a 256MB tmpfs > filesystem. Depending on how you check the size, you get two different > answers. > > root@10.41.50.66:/root> df -kl > rootfs 262144 255684 6460 98% / > > root@10.41.50.66:/root> du -sxk / > 204672 / > > Anyone know what's going on? df tells you what the filesystem says is in use or free, via statfs. du goes looking at the contents of the filesystem, totalling stats. Any files unlinked but held open will be counted by df but not by du. There might also be a discrepancy over indirect blocks, I'm not sure. Hugh - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/