Re: removing the remaining blockdev_direct_IO users

On Fri, 2026-07-10 at 07:07 +0200, Christoph Hellwig wrote:
> Hi all,
>=20
> we have 7 users of blockdev_direct_IO and one of the lower-level
> __blockdev_direct_IO left, and I'd really like to get rid of them.
>=20
> The filesystems are affs, fat, hfs, hfsplus, jfs, nilfs2, udf and
> ocfs2,
> and you are the relevant maintainers.=C2=A0 In 7.2 exfat converted
> entirely
> to iomap, which would be a really good example for a "simple" file
> system.=C2=A0 Another options especially for the file systems supporting
> foreign formats would be to just drop direct I/O support and reduce
> the support burden.

I like the idea. I think we can try to switch HFS/HFS+ and NILFS2 on
iomap approach. Do you have some initial patches for this? Which
particular commit(s) converted the exfat to iomap? It will be good to
take a deeper look into this conversion to estimate the complexity of
HFS/HFS+, NILFS2 modifications.

Thanks,
Slava.