to jail or not to jail

Matthew Seaman matthew at
Mon Jun 3 08:33:27 UTC 2019

On 02/06/2019 12:41, Dave Cottlehuber wrote:
>> think about using vimage jails on 12.0, as that makes the jails seem a
>> lot more like just regular VMs, and gives you the ability to effectively
>> create a private virtual switch inside your server, rather than having
>> services appear on external interfaces.  Beware though that there are
>> currently some quite severe bandwidth limitations on this sort of
>> internally virtualized networking under FreeBSD, so this is not suitable
>> for a high-traffic system.

> Matthew, anything you can point me to about this limitation?

Kristof Provost talked about it during his presentation at BSDCAN -- the 
video of that is not turning up in my searches, but here's probably a 
very similar talk from

In short the problem is that there's a single thread for handling all 
the internal traffic.  (Possibly a single lock as well?)



More information about the freebsd-questions mailing list