Re: [PATCH 13/17] watch_queue: Implement mount topology and attribute change notifications [ver #5]
- From
- David Howells <dhowells@redhat.com>
- Date
- 2020-07-24 10:20:11
- Also in
- keyrings, linux-fsdevel, linux-security-module, lkml
- Reply to
- David Howells, 2020-07-23
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