Re: [PATCH] btrfs: zstd: add `zstd-fast` alias mount option for fast modes

[Qu Wenruo <wqu@suse.com>]

在 2025/4/14 16:23, Daniel Vacek 写道:
> On Wed, 2 Apr 2025 at 16:31, Daniel Vacek <neelx@suse.com> wrote:
[...]
>> I'd still opt for keeping full range and functionality including
>> negative levels using the plain `zstd:N` option and having the other
>> just as an additional alias (for maybe being a bit nicer to some
>> humans, but not a big deal really and a matter of preference).
>> Checking the official documentation, it still mentions "negative
>> compression levels" being the fast option.
>>
>> https://facebook.github.io/zstd/
>> https://facebook.github.io/zstd/zstd_manual.html
>>
>> The deprecation part looks like just some gossip. It looks more about
>> the cli tool api and we are defining a kernel mount api - perfectly
>> unrelated.
> 
> Any feedback, Dave? I tend to drop this ida of `zstd-fast` alias.

Not Dave here, but if the future of "zstd-fast" is not that clear, we 
can definitely wait for a while.

It's always safer to adapt when the terminology is mature enough.

Thanks,
Qu

> 
>>> We can make this change before 6.15 final so it's not in any released
>>> kernel and we don't have to deal with compatibility.