From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from atl4mhob14.myregisteredsite.com ([209.17.115.52]:34690 "EHLO atl4mhob14.myregisteredsite.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754138Ab3GTPwD (ORCPT ); Sat, 20 Jul 2013 11:52:03 -0400 Received: from mailpod1.hostingplatform.com ([10.30.71.117]) by atl4mhob14.myregisteredsite.com (8.14.4/8.14.4) with ESMTP id r6KFq1tq005801 for ; Sat, 20 Jul 2013 11:52:01 -0400 Message-ID: <51EAB225.7070008@chinilu.com> Date: Sat, 20 Jul 2013 08:52:05 -0700 From: George Mitchell Reply-To: george@chinilu.com MIME-Version: 1.0 To: Jason Russell , linux-btrfs@vger.kernel.org Subject: Re: Lots of harddrive chatter on after booting with btrfs on root (slow boot) References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-btrfs-owner@vger.kernel.org List-ID: Sounds to me like a fragmentation issue. On 07/20/2013 08:15 AM, Jason Russell wrote: > Hi, > > I've been using btrfs for my root partition for about a month on > archlinux and recently Ive started using the i3 window manager and > starting X manually and I now boot to run level 3 (multi-user.target > for systemd) and Ive noticed that booting archlinux on a btrfs root, > there is a lot off hdd chatter after the login prompts are displayed, > which doesnt happen with ext4 on root, so I have done some testing and > comparisons. > > I have stripped down two arch installs, one with btrfs root and one > with ext4, (same laptop, same hdd) I removed all packages except for > the base group. On the btrfs root, there is about +- 15 seconds of hdd > chatter and it takes a long time to log in from the prompts, with the > ext4 root, the computer is silent after the prompts pop up and login > is almost instant. The prompts of the two installs pop up at more or > less the same time (+- 3 seconds) but the login on the btrfs root > takes muuch longer than the ext4. > > Ive also noted that this excessive hdd chatter does not occur > immediately after a fresh format with arch on btrfs root. > > Ive made some deductions/assumptions: > This only seems to occur with btrfs roots. > This only happens after some number of reboots OR after the partition > fills up a little bit. > Im pretty sure of ruled out everything except for the filesystem. > > > I have just done two clean installs to more thoroughly compare ext4 > and btrfs roots. So far no excessive hdd chatter from btrfs. > > I have also seen what I have described on two other computers > (different hardware entirely) where there is lots of hdd chatter from > btrfs root, and nothing from ext4. > > Here are two threads: > https://bbs.archlinux.org/viewtopic.php?pid=1117932 > https://bbs.archlinux.org/viewtopic.php?pid=1301684 > > Any ideas? > > Thanks, > > -- > Jason Russell > -- > To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > >