Hi!
merkaba:~> btrfs balance start -m /
ERROR: error during balancing '/' - No space left on device
There may be more info in syslog - try dmesg | tail
merkaba:~#19> dmesg | tail -22
[ 62.918734] CPU0: Package power limit normal
[ 525.229976] btrfs: relocating block group 20422066176 flags 1
[ 526.940452] btrfs: found 3048 extents
[ 528.803778] btrfs: found 3048 extents
[ 528.988440] btrfs: relocating block group 17746100224 flags 34
[ 529.116424] btrfs: found 1 extents
[ 529.247866] btrfs: relocating block group 17611882496 flags 36
[ 536.003596] btrfs: found 14716 extents
[ 536.170073] btrfs: relocating block group 17477664768 flags 36
[ 542.230713] btrfs: found 13170 extents
[ 542.353089] btrfs: relocating block group 17343447040 flags 36
[ 547.446369] btrfs: found 9809 extents
[ 547.663141] btrfs: 1 enospc errors during balance
[ 629.238168] btrfs: relocating block group 21894266880 flags 34
[ 629.359284] btrfs: found 1 extents
[ 629.520614] btrfs: 1 enospc errors during balance
[ 630.715766] btrfs: relocating block group 21927821312 flags 34
[ 630.749973] btrfs: found 1 extents
[ 630.899621] btrfs: 1 enospc errors during balance
[ 635.872857] btrfs: relocating block group 21961375744 flags 34
[ 635.906517] btrfs: found 1 extents
[ 636.038096] btrfs: 1 enospc errors during balance
merkaba:~> btrfs filesystem show
failed to read /dev/sr0
Label: 'debian' uuid: […]
Total devices 1 FS bytes used 7.89GB
devid 1 size 18.62GB used 17.58GB path /dev/dm-0
Btrfs Btrfs v0.19
merkaba:~> btrfs filesystem df /
Data: total=15.52GB, used=7.31GB
System, DUP: total=32.00MB, used=4.00KB
System: total=4.00MB, used=0.00
Metadata, DUP: total=1.00GB, used=587.83MB
This is repeatable.
martin@merkaba:~> cat /proc/version
Linux version 3.3.0-trunk-amd64 (Debian 3.3.4-1~experimental.1) (debian-
kernel AT lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-1) ) #1 SMP
Wed May 2 06:54:24 UTC 2012
Which is Debian´s variant of 3.3.4 with
commit bfe050c8857bbc0cd6832c8bf978422573c439f5
Author: Chris Mason <chris.mason AT oracle.com>
Date: Thu Apr 12 13:46:48 2012 -0400
Revert "Btrfs: increase the global block reserve estimates"
commit 8e62c2de6e23e5c1fee04f59de51b54cc2868ca5 upstream.
This reverts commit 5500cdbe14d7435e04f66ff3cfb8ecd8b8e44ebf.
We've had a number of complaints of early enospc that bisect down
to this patch. We'll hae to fix the reservations differently.
Signed-off-by: Chris Mason <chris.mason AT oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh AT linuxfoundation.org>
from 3.3.3.
May I need to wait for a proper fix to global block reserve for the balance
to succeed or do I see a different issue?
Since scrubbing still works I take it that balancing was aborted
gracefully and thus the filesystem is still intact. This is on a ThinkPad
T520 with Intel SSD 320. I only wanted to reorder metadata trees, I do not
think it makes much sense to relocate data blocks on a SSD. Maybe the
reordering metadata blocks may not make much sense also, but I thought I
still report this.
Thanks,
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7
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