Re: Filesystem full with unallocated space?

[Matthew Lai <m@matthewlai.ca>]

Hi Nikolay,

Updating to 4.15 seems to have fixed it.

Thanks!

Matthew


On 04/18/2018 05:48 PM, Nikolay Borisov wrote:
>
> On 17.04.2018 19:08, Matthew Lai wrote:
>> Hello!
>>
>> I am getting ENOSPC on my root filesystem with plenty of unallocated
>> space according to "fi usage". Any idea why that may be? This is a root
>> partition for Debian Stable. Not doing anything unusual that I'm aware
>> of. No snapshots.
>>
>> Thanks!
>>
>> Matthew
>>
>> uname -a:
>> Linux bigfoot 4.9.0-4-amd64 #1 SMP Debian 4.9.65-3+deb9u1 (2017-12-23)
>> x86_64 GNU/Linux
>>
>> btrfs --version:
>> btrfs-progs v4.7.3
>>
>> btrfs fi show:
>> Label: none  uuid: 2364c63f-e20c-410f-90b4-05f722ee1c77
>>      Total devices 1 FS bytes used 176.27GiB
>>      devid    1 size 246.33GiB used 185.01GiB path /dev/sda2
>>
>> btrfs fi df /:
>> Data, single: total=183.00GiB, used=175.78GiB
>> System, single: total=4.00MiB, used=48.00KiB
>> Metadata, single: total=2.01GiB, used=504.81MiB
>> GlobalReserve, single: total=211.39MiB, used=0.00B
>>
>
> You haven't shown "btrfs fi usage". In any case there were some patches
> in more recent kernels which deal with premature ENOSPC:
>
>
> 996478ca9c46 ("btrfs: change how we decide to commit transactions during
> flushing")
> 17024ad0a0fd ("Btrfs: fix early ENOSPC due to delalloc")
>
>
> I'd advise you update to 4.14 stable. Otherwise running:
> git log --oneline --grep "enospc" fs/btrfs/
>
> will shows you likely candidates.