From: Gabriel de Perthuis <g2p.code@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Re: Lots of harddrive chatter on after booting with btrfs on root (slow boot)
Date: Sat, 20 Jul 2013 22:47:46 +0000 (UTC) [thread overview]
Message-ID: <ksf42h$suu$1@ger.gmane.org> (raw)
In-Reply-To: CA+MxQPHSHVQQko8koeK=WCjS4wq+dss++PWUB6wq7TPOTsY3Yw@mail.gmail.com
On Sat, 20 Jul 2013 17:15:50 +0200, Jason Russell wrote:
> 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.
In my experience (as of 3.8 or so), Btrfs performance degrades on a
filled-up filesystem, even a comparatively new one. Various
background workers start to eat io according to atop.
> 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
next prev parent reply other threads:[~2013-07-20 22:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-20 15:15 Lots of harddrive chatter on after booting with btrfs on root (slow boot) Jason Russell
2013-07-20 15:52 ` George Mitchell
2013-07-20 22:14 ` Lukas Martini
2013-07-20 22:47 ` Gabriel de Perthuis [this message]
2013-07-21 10:38 ` Duncan
2013-07-21 16:20 ` autodefrag by default, was: Lots of harddrive chatter Chris Murphy
[not found] ` < pan$3c802$83940fc4$86279b1e$4ddf0e4e@cox.net>
[not found] ` < 09A15D35-4874-4650-93F1-1E151076C498@colorremedies.com>
2013-07-21 22:01 ` Duncan
2013-07-21 23:44 ` George Mitchell
2013-07-22 3:37 ` Shridhar Daithankar
2013-07-22 3:53 ` George Mitchell
2013-07-22 4:11 ` Shridhar Daithankar
[not found] ` < pan$7e18b$b2c36a61$b1f22c8c$6c61ba6e@cox.net>
[not found] ` <51EC7249.3010005@chinilu.com >
2013-07-22 12:09 ` Duncan
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