Mark Johnston efe8b26b82 Modify lockstat_nsecs() to just return unless lockstat probes are actually ... enabled. The cost of a timecounter read can be quite significant, and the problem became more apparent after r284297, since that change resulted in a call to lockstat_nsecs() for each acquisition of an rwlock read lock. PR: 201642 Reviewed by: avg Tested by: Jason Unovitch MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D3073		2015-07-18 00:22:00 +00:00
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boot/zfs	MFV r274273:	2014-11-10 08:20:21 +00:00
compat/opensolaris	Create a dedicated function for ensuring that cdir and rdir are populated.	2015-07-11 16:22:48 +00:00
contrib/opensolaris	vfs: implement v_holdcnt/v_usecount manipulation using atomic ops	2015-07-16 13:57:05 +00:00
dev	Modify lockstat_nsecs() to just return unless lockstat probes are actually	2015-07-18 00:22:00 +00:00