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Correct the predicates on which lockstat:::{thread,spin}-spin fire.

Description

Correct the predicates on which lockstat:::{thread,spin}-spin fire.

In particular, they should fire only if the lock was owned by another
thread when we first attempted to acquire that lock.

MFC after: 1 week

Details

Provenance
markjAuthored on
Parents
rS321743: Add taskqueue_enqueue_timeout_sbt(), because sometimes you want more control
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