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List:       opensuse-factory
Subject:    Re: Heads up: UsrMerge impact imminent
From:       Ludwig Nussel <ludwig.nussel () suse ! de>
Date:       2021-06-11 8:40:08
Message-ID: 5d5ba08e-7229-6736-d8ff-ca28ea1ee8e5 () suse ! de
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Aleksa Sarai wrote:
> On 2021-06-01, Neal Gompa <ngompa13@gmail.com> wrote:
>> On Tue, Jun 1, 2021 at 9:48 PM Niklas Haas <lists.suse@haasn.dev> wrote:
>>>
>>> I submitted https://build.opensuse.org/request/show/896791
>>
>> We don't support filesystems without RENAME_EXCHANGE, and this code
>> makes the change not atomic and frankly quite scary. Shouldn't you bug
>> the OpenZFS people to implement renameat(2) instead?
> 
> I just ran into this bug today, and I realised that this bug actually
> also affects users who run containers on *different hosts* that have ZFS
> as the backing filesystem. For instance, running Tumbleweed on Ubuntu
> (which has ZFS as the default filesystem) will result in this error

The workaround to fall back to non-atomic double rename is now in
Factory and will be available with the next snapshot. So the usrmerge
will work on such systems, albeit not atomic.

cu
Ludwig

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