panic: pmap_demote_section: No l2_bucket for wired mapping

[Paul Mather]

On Mar 22, 2015, at 7:54 AM, Michael Tuexen <tuexen at freebsd.org> wrote:

> Dear all,
> 
> running head on a Raspberry Pi became unstable. When running
> r280329 for a while (the machine is exposed to the Internet, so
> ssh logins are continuously tried), the machine panics:
> 
> panic: pmap_demote_section: No l2_bucket for wired mapping
> KDB: enter: panic


I get this panic when booting to multi-user on my newly-updated BBB (FreeBSD 11.0-CURRENT #0 r280350).  As pointed out later in this thread, setting vm.pmap.sp_enabled=0 prevents the panic (so far) and allows booting.

Cheers,

Paul.