On Wed, Jun 15, 2022 at 10:12:32AM -0600, Logan Gunthorpe wrote: > A pseudo mount is used to allocate an inode for each PCI device. The > inode's address_space is used in the file doing the mmap so that all > VMAs are collected and can be unmapped if the PCI device is unbound. > After unmapping, the VMAs are iterated through and their pages are > put so the device can continue to be unbound. An active flag is used > to signal to VMAs not to allocate any further P2P memory once the > removal process starts. The flag is synchronized with concurrent > access with an RCU lock. Can't we come up with a way of doing this without all the pseudo-fs garbagage? I really hate all the overhead for that in the next nvme patch as well.
