ssh sessions close spontaneously on rpi2

[Trev]

bob prohaska wrote on 23/11/2017 04:36:

[chomp]
> Far as I can tell the problems with ssh disconnection are tied to
> running make -jN processes in /usr/ports.  Make -j4 buildworld in /usr/src
> does not obviously interfere with subsequent ssh connections.
> 
> Running make -j4 -DBATCH in /usr/ports/www/firefox also breaks ssh connections,
> but not quite so fast, it takes a few minutes for new ssh sessions to fail.
> Incidentally, the -DBATCH flag is ignored.
> 
> That make stopped on a stale readline installation. After manually upgrading
> readline, the make was restarted without -j4 in /usr/ports/www/firefox and,
> some ten minutes later, the ssh connections are still working.
> 
> Looks like the trouble is related to make -jN, but only in /usr/ports. It's
> understood the -j option is not a sure thing in ports, but having it
> interfere with ssh connections seems most strange.

I've had similar issues (wireless USB dongle failing and settings being 
corrupted) with FreeBSD 11 Stable - I tracked it down to power usage 
when using make -j (I have two 32GB USB memory dongles also plugged in, 
one of which contains /usr). May be related?