Re: Should we consider disable generic/563 for file systems that do not support cgroup2?

[Christoph Hellwig <hch@infradead.org>]

On Mon, Jul 20, 2026 at 03:15:47AM +0800, Zorro Lang wrote:
> Sure, hardcoding a _notrun based on FSTYP is a last resort, and it would
> definitely be better if we had a more elegant way to trigger the _notrun.
> As a test suite, I cannot enforce or dictate what features a specific
> filesystem must export just for the convenience of testing :)

Yes.  And if we have to do that it should at least be in a common helper
and not sprinkled over the tests.

> /sys/fs/$FSTYP/features/ is indeed incredibly helpful! Just a couple of
> days ago, I was actually discussing expanding _require_fs_sysfs to support
> features/ checks there, since our current checks are limited to the
> /sys/fs/$FSTYP/$device/ directory:
> 
> https://lore.kernel.org/fstests/aloCfjjqesxpzL9z@zlang-mailbox/T/#mc5a0492cc00550467256951042828bef5d7fa38d

features can very much depend on the actual file system instance.
Trying to expose them globally doesn't make much sense.