Illumos/gate 9740f25 — usr/src/test/zfs-tests/tests/functional/pool_checkpoint pool_checkpoint.kshlib, usr/src/uts/common/fs/zfs spa.c arc.c
10853 spa_sync, vs_alloc can underflow and checkpoint test fixes
Portions contributed by: Jerry Jelinek <jerry.jelinek at joyent.com>
Reviewed by: Matt Ahrens <mahrens at delphix.com>
Reviewed by: Brian Behlendorf <behlendorf1 at llnl.gov>
Reviewed by: Igor Kozhukhov <igor at dilos.org>
Reviewed by: George Melikov <mail at gmelikov.ru>
Reviewed by: Kody Kantor <kody.kantor at joyent.com>
Approved by: Gordon Ross <gwr at nexenta.com>
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