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From: Martin Steigerwald <martin@lichtvoll.de>
To: Martin Raiber <martin@urbackup.org>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: With Linux 5.5: Filesystem full while still 90 GiB free
Date: Wed, 29 Jan 2020 22:20:02 +0100	[thread overview]
Message-ID: <2049829.BAvHWrS4Fr@merkaba> (raw)
In-Reply-To: <0102016ff2e7e3ad-6b776470-32f1-4b3d-9063-d3c96921df89-000000@eu-west-1.amazonses.com>

Martin Raiber - 29.01.20, 21:04:41 CET:
> On 29.01.2020 20:33 Martin Steigerwald wrote:
> > I thought this would not happen anymore, but see yourself:
> > 
> > % LANG=en df -hT /daten
> > Filesystem             Type   Size  Used Avail Use% Mounted on
> > /dev/mapper/sata-daten btrfs  400G  310G     0 100% /daten
> > 
> > I removed some larger files but to no avail.
> 
> I have the same issue since 5.4. This patch should fix it:
> https://lore.kernel.org/linux-btrfs/f1f1a2ab-ed09-d841-6a93-a44a8fb231
> 2f@gmx.com/T/ Confirm by writing to the file system. It shouldn't say
> that it is out of space (only df report says zero).
> 
> As far as I know, it is unfortunately not fixed in any released kernel
> yet.

Indeed remaining metadata space in the one 1 GiB big metadata chunk is 
less than global reserve:

> > However, also according to btrfs fi usage it is perfectly good:
> > 
> > % btrfs fi usage -T /daten
> > 
> > Overall:
> >     Device size:                 400.00GiB
> >     Device allocated:            311.04GiB
> >     Device unallocated:           88.96GiB
> >     Device missing:                  0.00B
> >     Used:                        309.50GiB
> >     Free (estimated):             90.16GiB      (min: 90.16GiB)
> >     Data ratio:                       1.00
> >     Metadata ratio:                   1.00
> >     Global reserve:              364.03MiB      (used: 0.00B)
> >     
> >                           Data      Metadata  System
> > 
> > Id Path                   single    single    single   Unallocated
> > -- ---------------------- --------- --------- -------- -----------
> > 
> >  1 /dev/mapper/sata-daten 310.00GiB   1.01GiB 32.00MiB    88.96GiB
> > 
> > -- ---------------------- --------- --------- -------- -----------
> > 
> >    Total                  310.00GiB   1.01GiB 32.00MiB    88.96GiB
> >    Used                   308.80GiB 714.67MiB 64.00KiB

Hmmm, Dolphin file manager said out of space, but it may be cause it 
meanwhile checks for enough available space *before* initiating the copy 
or move operation.

Consequently using "mv" worked to move the files to that filesystem.

Thank you for that hint.

So if its just a cosmetic issue then I can wait for the patch to land in 
linux-stable. Or does it still need testing?

Best,
-- 
Martin



  reply	other threads:[~2020-01-29 21:20 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-29 19:33 With Linux 5.5: Filesystem full while still 90 GiB free Martin Steigerwald
2020-01-29 20:04 ` Martin Raiber
2020-01-29 21:20   ` Martin Steigerwald [this message]
2020-01-29 22:55     ` Chris Murphy
2020-01-30 10:41       ` Martin Steigerwald
2020-01-30 16:37         ` Chris Murphy
2020-01-30 20:02           ` Martin Steigerwald
2020-01-30 20:18             ` Chris Murphy
2020-01-30 20:59               ` Josef Bacik
2020-01-30 21:09                 ` Chris Murphy
2020-01-30 21:32                   ` Martin Raiber
2020-01-30 21:42                     ` Josef Bacik
2020-01-30 21:12                 ` Martin Steigerwald
2020-01-30 21:10               ` Martin Steigerwald
2020-01-30 21:20                 ` Remi Gauvin
2020-01-30 23:12                   ` Martin Steigerwald
2020-01-31  1:43                     ` Matt Corallo
2020-01-31  1:57                       ` Qu Wenruo
2020-03-02  1:57                         ` Etienne Champetier
2020-03-02  1:59                           ` Qu Wenruo
2020-01-31  4:12                       ` Etienne Champetier
2020-01-30 17:19       ` David Sterba
2020-01-30 19:31         ` Chris Murphy
2020-01-30 19:58           ` Martin Steigerwald
2020-01-31  3:00           ` Zygo Blaxell

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