• Add a global option where we can protect processes when swap space is exhausted.

How to use:

Basically we need to add on rc.conf an another option like:

If we want to protect only the main processes.
syslogd_oomprotect="YES"

If we want to protect all future children of the specified processes.
syslogd_oomprotect="ALL"

PR: 204741 (based on)
Submitted by: eugen@grosbein.net
Reviewed by: jhb, allanjude, rpokala and bapt
MFC after: 4 weeks
Relnotes: Yes
Sponsored by: gandi.net
Differential Revision: https://reviews.freebsd.org/D5176