On Tue, Feb 03, 2026 at 03:32:04PM -0500, Waiman Long wrote: > That is actually a concern that I have at the back of my mind. I can modify > the patch to cache only the dentry and do get/put the mount every time which > is much cheaper as it is a percpu counter. In that way, a chdir(2) followed > by a umount(2) shouldn't cause a -EBUSY. Right?
Quite - it will just retain a reference to dentry, with filesystem shutdown being very unhappy about somebody retaining references to objects on the filesystem about to be taken out...
