Re: [PATCH 03/11] VFS: add dentry_lookup_killable()

[NeilBrown]

On Wed, 13 Aug 2025, Al Viro wrote:
> On Tue, Aug 12, 2025 at 12:25:06PM +1000, NeilBrown wrote:
> > btrfs/ioctl.c uses a "killable" lock on the directory when creating an
> > destroying subvols.  overlayfs also does this.
> > 
> > This patch adds dentry_lookup_killable() for these users.
> > 
> > Possibly all dentry_lookup should be killable as there is no down-side,
> > but that can come in a later patch.
> 
> Same objections re lookup_flags and it would be better to do that
> at the same point where you convert the (btrfs and overlayfs?) callers.
> 

I had trouble deciding whether it would be better to merge the patches
for easy review, or keep them separate in case they needed to go through
different trees.. I guess I decided wrongly.

NeiBrown