From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from plane.gmane.org ([80.91.229.3]:58213 "EHLO plane.gmane.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752210AbaHXSI0 (ORCPT ); Sun, 24 Aug 2014 14:08:26 -0400 Received: from list by plane.gmane.org with local (Exim 4.69) (envelope-from ) id 1XLcDJ-0008PO-42 for linux-btrfs@vger.kernel.org; Sun, 24 Aug 2014 20:08:25 +0200 Received: from pd953e32c.dip0.t-ipconnect.de ([217.83.227.44]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 24 Aug 2014 20:08:25 +0200 Received: from holger.hoffstaette by pd953e32c.dip0.t-ipconnect.de with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 24 Aug 2014 20:08:25 +0200 To: linux-btrfs@vger.kernel.org From: Holger =?iso-8859-1?q?Hoffst=E4tte?= Subject: Re: 6+ MiB/s constant usage on a btrfs volume with kernel 3.16 Date: Sun, 24 Aug 2014 18:08:12 +0000 (UTC) Message-ID: References: <441201408902401@web23m.yandex.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Sun, 24 Aug 2014 19:46:41 +0200, Flash ROM wrote: >> Happens a 100% of the time here, annoyingly. As mentioned, 3.15 was >> working for me, and still does. Multiple reboots and it happens >> immediately on boot even before gdm comes up. > Would be logical to do block-level I/O tracing to get idea WHAT is this > IO, right? Or you could just use proper tools for this: iotop: http://guichaz.free.fr/iotop/ iosnoop: http://www.brendangregg.com/blog/2014-07-16/iosnoop-for-linux.html Probably either a continuing balance or autodefrag vs. systemd's logging. -h