K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2019-09-23T20:50:04.336441Z
K 7
svn:log
V 285
cache: tidy up handling of negative entries

- track the total count of hot entries
- pre-read the lock when shrinking since it is typically already taken
- place the lock in its own cacheline
- shorten the hold time of hot lock list when zapping

Sponsored by:	The FreeBSD Foundation

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