Re: [PATCH 1/2] btrfs: test qgroup limit handling on fsverity rollback

[Qu Wenruo <quwenruo.btrfs@gmx.com>]

在 2026/9/16 14:42, Daniel Linjama 写道:
> On 2026/9/15 15:20, Qu Wenruo wrote:
>>> +_require_btrfs_command quota
>>
>> _require_btrfs_command quota rescan -w
> 
> Will do in v2.

The better solution is _require_qgroup_rescan(), which has the extra 
checks for -W and -w options built-in.

> 
>>> +    _qgroup_rescan $SCRATCH_MNT >> $seqres.full 2>&1
>>
>> Use "-w" option, or the rescan may not finish in time before the workload.
> 
> _qgroup_rescan already runs "btrfs quota rescan -w", so the test waits
> for the rescan. I'll keep the helper.
> 
>>> +    while dd if=/dev/zero of=$subv/filler.$i bs=1M count=4 status=none 2>/dev/null; do
>> [...]
>> You can just do a 40MiB write (which should fail halfway), sync, retry
>> the write until the write failed to write any bytes.
> 
> Will do in v2, with xfs_io instead of dd as the other tests do. A single
> write turned out to be enough: after it fails with -EDQUOT and a sync,
> nothing more fits, so there is no retry loop.
> 
> Thanks,
> Daniel