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From: Marc MERLIN <marc@merlins.org>
To: Josef Bacik <josef@toxicpanda.com>
Cc: Roman Mamedov <rm@romanrm.net>,
	dsterba@suse.cz, Martin Steigerwald <martin@lichtvoll.de>,
	linux-btrfs@vger.kernel.org, kernel-team@fb.com
Subject: Re: btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that.
Date: Sat, 22 Feb 2020 06:51:34 -0800	[thread overview]
Message-ID: <20200222145134.GV19481@merlins.org> (raw)
In-Reply-To: <20200222012312.GC31491@merlins.org>

On Fri, Feb 21, 2020 at 05:23:12PM -0800, Marc MERLIN wrote:
> On Fri, Feb 21, 2020 at 05:06:37PM -0800, Marc MERLIN wrote:
> > You asked for a check, it's running but may take a while:
> > gargamel:~# btrfs check /dev/mapper/vgds2-ubuntu
> > Checking filesystem on /dev/mapper/vgds2-ubuntu
> > UUID: 905c90db-8081-4071-9c79-57328b8ac0d5
> > checking extents
> > checking free space cache
> > checking fs roots
> > checking only csum items (without verifying data)
> > 
> > I'll paste the completion when it's done.
>  
> Ok, faster than I thought. btrfs check came back clean
> I added spaces for readability.
> So this claims I'm using 9TB?
> 
> Is it possible that I'm hitting this problem
> 1) I did really fill the filesystem (well not to the filesystem size but
> to the size that dm-thin was not able to give blocks anymore)
> 2) I deleted/freed up the space
> 3) btrfs needs space to free up the space, and there is no space left,
> so it's unable to mark the free blocks, as free, and I'm therefore
> stuck?
> 
> found 9 255 703 285 760 bytes used, no error found
> total csum bytes: 9 019 442 564
> total tree bytes: 17 533 894 656
> total fs tree bytes: 7 411 073 024
> total extent tree bytes: 379 928 576
> btree space waste bytes: 1 769 834 145
> file data blocks allocated: 9267682025472
>  referenced 9272533270528

Ok, last call before I delete this filesystem and recover my system to a
working state. I don't need the filesystem fixed, it's fairly quick for
me restore it, but obviously if there is any useful state in it for
improving the code, that will be lost.

I understand it's the weekend, if someone thinks I should wait until
monday to give some other folks the chance to see/reply, let me know,
and I'll keep my system down until monday.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08

  reply	other threads:[~2020-02-22 14:51 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-31 14:31 [PATCH] btrfs: do not zero f_bavail if we have available space Josef Bacik
2020-01-31 20:06 ` Martin Steigerwald
2020-02-01  1:00 ` Qu Wenruo
2020-02-02 17:52 ` David Sterba
     [not found]   ` <CAKhhfD7S=kcKLRURdNFZ8H4beS8=XjFvnOQXche7+SVOGFGC_w@mail.gmail.com>
2020-02-19  9:17     ` Martin Steigerwald
2020-02-19 13:43       ` Marc MERLIN
2020-02-19 14:31         ` David Sterba
2020-02-19 15:36           ` Marc MERLIN
2020-02-19 17:50             ` Roman Mamedov
2020-02-19 22:21               ` Martin Steigerwald
2020-02-20 21:46             ` Marc MERLIN
2020-02-21  5:38               ` Marc MERLIN
2020-02-21  5:45                 ` Roman Mamedov
2020-02-21 23:07                   ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Marc MERLIN
2020-02-21 23:17                     ` How to roll back btrfs filesystem a few revisions? Marc MERLIN
2020-02-21 23:47                       ` Josef Bacik
2020-02-22  0:08                         ` Marc MERLIN
2020-02-22  0:36                           ` Josef Bacik
2020-02-21 23:43                     ` btrfs filled up dm-thin and df%: shows 8.4TB of data used when I'm only using 10% of that Josef Bacik
2020-02-22  0:01                       ` Marc MERLIN
2020-02-22  0:43                         ` Josef Bacik
2020-02-22  1:06                         ` Marc MERLIN
2020-02-22  1:23                           ` Marc MERLIN
2020-02-22 14:51                             ` Marc MERLIN [this message]
2020-02-22 14:52                               ` Josef Bacik
2020-02-22 15:24                                 ` Marc MERLIN

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