bapt 0419f346b4 remove the poor emulation of the IllumOS needfree global variable to prevent
the ARC reclaim thread running longer than needed.

Update the arc::needfree dtrace probe triggered in arc_lowmem() to also report
the value we may want to free.

Submitted by:	Nikita Kozlov <nikita.kozlov at blade-group.com>
Reviewed by:	avg
Approved by:	avg
MFC after:	3 weeks
Sponsored by:	blade
Differential Revision:	https://reviews.freebsd.org/D12163
2017-11-15 12:48:36 +00:00
..