From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:45998 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751524AbcEEGfr (ORCPT ); Thu, 5 May 2016 02:35:47 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1ayCsy-0005qe-Ho for linux-btrfs@vger.kernel.org; Thu, 05 May 2016 08:35:44 +0200 Received: from ip5f5ae06c.dynamic.kabel-deutschland.de ([95.90.224.108]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 05 May 2016 08:35:44 +0200 Received: from hurikhan77 by ip5f5ae06c.dynamic.kabel-deutschland.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Thu, 05 May 2016 08:35:44 +0200 To: linux-btrfs@vger.kernel.org From: Kai Krakow Subject: Re: commands like "du", "df", and "btrfs fs sync" hang Date: Thu, 5 May 2016 08:35:37 +0200 Message-ID: <20160505083537.0811b46f@jupiter.sol.kaishome.de> References: <20160501090046.638fc2c6@jupiter.sol.kaishome.de> <20160503084814.3e355f56@jupiter.sol.kaishome.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-btrfs-owner@vger.kernel.org List-ID: Am Tue, 3 May 2016 08:48:14 +0200 schrieb Kai Krakow : > Am Sun, 1 May 2016 20:39:31 -0400 > schrieb Nicholas D Steeves : > > > On 1 May 2016 at 03:00, Kai Krakow wrote: > > > Hello! > > > > > > I'm not sure what triggeres this, neither if it is btrfs specific. > > > The filesystems have been recreated from scratch. Mainly during my > > > rsync backup (from btrfs to btrfs), but not necessarily limited to > > > rsync usage, my system experiences uninterruptable freezes of > > > commands like "df", "du", "btrfs fs sync", and probably more. > > > > Out of curiosity, does this occur if you don't create or delete > > snapshots, or if your backup script doesn't create or delete > > snapshots? And when it occurs, are you able to go to another > > terminal and run a command that you don't use often, that > > definitely had to be read from disk, but that doesn't query any > > filesystem properties (eg: whois)? > > I only create snapshots in the destination device, not on the source. > I could try disabling the snapshotting and see if it changes things. > > It seems from my observation, that only programs querying disk free or > disk usage status hang, especially all of the btrfs subcommands doing > it hang, in addition to traditional programs like du and df. I think > also "btrfs sub delete" and friends hang. So your guess may very well > go into the right direction. Let me try. Coming back later... With the snapshot and sync related bits disabled in my script, I no longer experience freezing df/du/... commands. -- Regards, Kai Replies to list-only preferred.