Re: [f2fs-dev] [PATCHv2 0/5] direct-io file extended attributes

[Eric Biggers <ebiggers@kernel.org>]

On Fri, Jul 10, 2026 at 02:06:41PM -0700, Keith Busch via Linux-f2fs-devel wrote:
> From: Keith Busch <kbusch@kernel.org>
> 
> The attributes reported through statx are incomplete for applications to
> fully know exactly how IO construction is valid or not. The statx call
> can report minimum memory alignment and total granularity, but it
> doesn't show the underlying gap boundary requirements or max segments
> per granule.
> 
> This series adds the minimum to the extended file attributes through
> file_getattr. I hear this is the preferred interface for reporting such
> things over adding more fields to statx. In order to get everything
> under a single syscall, some of the attributes are duplicated from
> statx.

Okay, in v2 we at least now know that the existing statx UAPI was
considered.  Could you give a specific real-world example (with the
actual values of each parameter) where it's not sufficient?  Without
that there isn't really any way to evaluate this proposal.

- Eric