DLPX-96025 zfs_arc_meta_strategy no longer exists

PR URL: https://www.github.com/delphix/delphix-platform/pull/553

Author: dbjwhs-perforce

debian/postinst

@@ -46,7 +46,7 @@ configure)
 	systemctl disable motd-news.timer
 
 	# Disable multipathd service by default. It will be enabled if the iSCSI initiator feature is used
-  systemctl disable multipathd.service
+	systemctl disable multipathd.service
 
 	#
 	# Various tools generate mail on the system, e.g. cron, and we don't

files/common/lib/modprobe.d/10-zfs.conf

@@ -83,21 +83,6 @@ options zfs zfs_mg_noalloc_threshold=5
 #
 options zfs zfs_override_estimate_recordsize=8192
 
-#
-# The default arc metadata eviction policy is a balanced policy. This policy
-# evicts both data and metadata and provides a callback to the ZPL layer
-# to evict blocks from the inode and dentry caches. This policy has serious
-# implications because it tries too hard to reduce metadata so that it's
-# below the arc_meta_limit. As a result this can end up consuming all of
-# the cpus and causing the system to run out of memory. Since the arc
-# metadata eviction is called in the critical path, we want a lightweight
-# policy to be used to ensure that eviction happens quickly and new additions
-# to the arc are not blocked for a significant amount of time. To do this,
-# we changes the metadata eviction policy to ARC_STRATEGY_META_ONLY,
-# which is what we used in illumos.
-#
-options zfs zfs_arc_meta_strategy=0
-
 #
 # Increasing zvol taskq threads to 256 to improve performance for some
 # workloads. Taskq threads are created and destroyed dynamically so there