Messages in this thread | | | From | David Howells <> | Subject | Re: [PATCH 13/17] watch_queue: Implement mount topology and attribute change notifications [ver #5] | Date | Fri, 24 Jul 2020 11:19:59 +0100 |
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David Howells <dhowells@redhat.com> wrote:
> > 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
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