Hi, We (Red Hat) have been building Zero on s390 for a while now. In order to do so we needed to have this patch to reduce the maximum heap size setting for big workloads. Otherwise we see this during (JDK 9) builds:
++ /usr/bin/tee /builddir/build/BUILD/java-9-openjdk-9.0.4.12-5.openjdk9.el7.s390/openjdk/build/jdk/modules/java.base/_the.java.base_batch.log ++ /usr/bin/tee /builddir/build/BUILD/java-9-openjdk-9.0.4.12-5.openjdk9.el7.s390/openjdk/build/jdk/modules/java.base/_the.java.base_batch.log Error occurred during initialization of VM Could not reserve enough space for 1048576KB object heap NOTE: JDK 9 has the same build logic than JDK 11 in terms of big workloads' JVM switches. Bug: https://bugs.openjdk.java.net/browse/JDK-8201495 webrev: http://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8201495/webrev.01/ Testing: Run configure on s390 and inspected the big workloads settings: Before: checking flags for bootcycle boot jdk java command for big workloads... -Xms64M -Xmx998M -XX:ThreadStackSize=768 After: checking flags for bootcycle boot jdk java command for big workloads... -Xms256M -Xmx768M -XX:ThreadStackSize=768 This should be fairly low risk, since the check is guarded by s390 archicture checks. Other architectures should be unaffected. Thanks, Severin
