[Bug 224080] ZFS: "arc_dnlc_evicts_thr" + "arc_reclaim_thread" - high CPU load during poudriere build...

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=224080

--- Comment #45 from commit-hook at freebsd.org ---
A commit references this bug:

Author: jeff
Date: Tue Jan  2 04:35:57 UTC 2018
New revision: 327485
URL: https://svnweb.freebsd.org/changeset/base/327485

Log:
  Fix arc after r326347 broke various memory limit queries.  Use UMA features
  rather than kmem arena size to determine available memory.

  Initialize the UMA limit to LONG_MAX to avoid spurious wakeups on boot before
  the real limit is set.

  PR:           224330 (partial), 224080
  Reviewed by:  markj, avg
  Sponsored by: Netflix / Dell EMC Isilon
  Differential Revision:        https://reviews.freebsd.org/D13494

Changes:
  head/sys/cddl/compat/opensolaris/sys/kmem.h
  head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/arc.c
  head/sys/vm/uma.h
  head/sys/vm/uma_core.c
  head/sys/vm/uma_int.h

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