svn commit: r365620 - head/sys/riscv/conf

[John Baldwin]

Author: jhb
Date: Fri Sep 11 00:06:16 2020
New Revision: 365620
URL: https://svnweb.freebsd.org/changeset/base/365620

Log:
  Disable WITNESS for spin locks by default.
  
  This matches all other architectures and removes substantial overhead.
  
  Reported by:	arichardson (indirectly)
  Reviewed by:	imp, arichardson
  Obtained from:	CheriBSD
  Sponsored by:	DARPA
  Differential Revision:	https://reviews.freebsd.org/D26403

Modified:
  head/sys/riscv/conf/GENERIC

Modified: head/sys/riscv/conf/GENERIC
==============================================================================
--- head/sys/riscv/conf/GENERIC	Fri Sep 11 00:04:23 2020	(r365619)
+++ head/sys/riscv/conf/GENERIC	Fri Sep 11 00:06:16 2020	(r365620)
@@ -140,7 +140,7 @@ options 	DEADLKRES		# Enable the deadlock resolver
 options 	INVARIANTS		# Enable calls of extra sanity checking
 options 	INVARIANT_SUPPORT	# Extra sanity checks of internal structures, required by INVARIANTS
 options 	WITNESS			# Enable checks to detect deadlocks and cycles
-# options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
+options 	WITNESS_SKIPSPIN	# Don't run witness on spinlocks for speed
 options 	MALLOC_DEBUG_MAXZONES=8	# Separate malloc(9) zones
 # options 	EARLY_PRINTF
 options 	VERBOSE_SYSINIT=0	# Support debug.verbose_sysinit, off by default