jdk11 - 8214315: G1: fatal error: acquiring lock SATB_Q_FL_lock/1 out of order with lock tty_lock/0

[Baesken, Matthias]

Hello,  please review this downport  of  8214315 to  jdk11u-dev .
It turned out we need this change  as a prerequisite  for

https://bugs.openjdk.java.net/browse/JDK-8224958


The  jdk/jdk - patch  applies   mostly  without a lot of adjustments .



Webrev for 11  and original bug :

http://cr.openjdk.java.net/~mbaesken/webrevs/8214315_11udev.0/

https://bugs.openjdk.java.net/browse/JDK-8214315


original  jdk/jdk  change was :

http://hg.openjdk.java.net/jdk/jdk/rev/bf2f2560dd53



Thanks and best regards, Matthias