Re: space info full

[Yan Zheng <ukernel@gmail.com>]

Martin B=C3=BCrger wrote:
> Hello,
> 'space info full' was the only message I got from dmesg. df reports:
>=20
> /dev/sdb1             33551720  28504548   5047172 =20
> 85% /mnt/btrfstest

The output of df can be inaccurate. Although df shows the FS is 85% ful=
l,
It's possible the FS is completely full.

>=20
> df -i reports:
> /dev/sdb1                  0       0       0    -  /mnt/btrfstest
>=20
> Any (e.g., touch, rm) operation on that mounted filesystem lets the=20
> CPU rise and the system hang...

btrfs can't properly handle disk full condition currently. ENOSPC can
result in BUG()

>=20
> I was filling up the partition with compilebench to the ration=20
> mentioned above. During this process I tried to create a subvolume=20
> with
> 	btrfsctl -s sub_vol /mnt/btrfstest
> which did not, as opposed to the advices from the INSTALL file,=20
> create anything within /mnt/btrfstest.

Please try mount the FS with -o subvol=3D. option, you will see the new
subvol.

Regards
Yan Zheng
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