akka/akka — pull request #15481 by duarten (2014-07-02 08:49:19+00:00)
Title: Removed guard around _logLevel

This patch removes a lock around the getter of _logLevel. The setter is
still guarded for consistency. Note that out of thin-air reads, while
not excluded under the current JMM, are forbidden by current hardware.

We needed to read the log level for some additional logging requirements,
and the lock was proving to be a bottleneck.