Re: removing the remaining blockdev_direct_IO users

On Mon, 2026-07-13 at 11:58 +0200, Christoph Hellwig wrote:
> On Fri, Jul 10, 2026 at 09:51:09AM -0700, Viacheslav Dubeyko wrote:
> > 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.
> >=20
> > 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.
>=20
> Almost all commits in fs/exfat/ in 7.2-rc1, starting with
> 623f0aa1eca5c2a94ca1e4e5de719d062eac3b6c

OK. Thanks for sharing this. :) Let me take a look and spend some time
on this. I should have a time for checking commits during this week. I
hope so. :)

Thanks,
Slava.