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

[Qu Wenruo]

在 2025/4/14 16:23, Daniel Vacek 写道:
> On Wed, 2 Apr 2025 at 16:31, Daniel Vacek <neelx@xxxxxxxx> 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.