Re: [RFC] metadata updates vs. fetches (was Re: [PATCH v4] fs: Fix data race in inode_set_ctime_to_ts)

[Mateusz Guzik]

On Sun, Nov 24, 2024 at 11:10 PM Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> So I mention the "rename and extend i_size_seqcount" as a solution
> that I suspect might be acceptable if somebody has the motivation and
> energy, but honestly I also think "nobody can be bothered" is
> acceptable in practice.
>

So happens recently the metadata ordeal also came up around getattr
where a submitter wanted to lock the inode around it.

Looks like this is a recurring topic?

Until the day comes when someone has way too much time on their hands
and patches it up (even that may encounter resistance though), I do
think it would make sense to nicely write it down somewhere so for
easy reference -- maybe as a comment above getattr and note around
other places like the timespec helpers to read that.

-- 
Mateusz Guzik <mjguzik gmail.com>