Re: [PATCH 13/17] watch_queue: Implement mount topology and attribute change notifications [ver #5]

David Howells [off-list ref] wrote:

quoted

What guarantees that mount_id is going to remain a 32bit entity?

You think it likely we'd have >4 billion concurrent mounts on a system?  That
would require >1.2TiB of RAM just for the struct mount allocations.

But I can expand it to __u64.

That said, sys_name_to_handle_at() assumes it's a 32-bit signed integer, so
we're currently limited to ~2 billion concurrent mounts:-/

David