Kernel crash dumps and swap

[Konstantin Belousov]

On Fri, Sep 04, 2015 at 10:53:30AM +0000, John Dison via freebsd-hackers wrote:
> So if I use dumpdev="/path/to/dev" I can have kernel crash dumps without swap enabled?This should be clarified in documentation IMO, right now I have an impression that swap is mandatory for crash dumps to work.

Swap and dump uses are separate.  You can put dump on swap, but you can not
put it as well.  On my test machines I usually do not mix them, because
crash dumps are precious during testing.