Re: [RFC PATCH 01/10] vfio: Create vfio_fs_type with inode per device

[Christoph Hellwig]

On Mon, Feb 22, 2021 at 09:50:35AM -0700, Alex Williamson wrote:
> By linking all the device fds we provide to userspace to an
> address space through a new pseudo fs, we can use tools like
> unmap_mapping_range() to zap all vmas associated with a device.
> 
> Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Signed-off-by: Alex Williamson <alex.williamson@xxxxxxxxxx>

Adding Al:

I hate how we're are growing these tiny file systems just to allocate an
anonymous inode all over.  Shouldn't we allow to enhance fs/anon_inodes.c
to add a new API to allocate a new specific inode from anon_inodefs
instead?