JDK-8242273 : Shenandoah: accept either SATB or IU barriers, but not both
  • Type: Bug
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 8-shenandoah,11-shenandoah,14,15
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2020-04-07
  • Updated: 2022-02-24
  • Resolved: 2020-04-07
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JDK 14 JDK 15
14.0.2Fixed 15 b18Fixed
Related Reports
Relates :  
JDK-8242054 - Shenandoah: New incremental-update mode
Description
The follow-up for JDK-8242054, we need to make sure users cannot enable both SATB and IU barriers together. Currently Shenandoah blindly accepts +ShenandoahSATBBarrier +ShenandoahStoreValEnqueueBarrier, which might lead to surprising behaviors.
Comments
Fix Request (14u) This improves Shenandoah UX and provides the ground for subsequent backports. Patch applies cleanly to 14u, passes hotspot_gc_shenandoah, tier{1,2} with Shenandoah enabled. Patch is completely isolated in Shenandoah code.
13-05-2020
URL: https://hg.openjdk.java.net/jdk/jdk/rev/142c56cfa14a User: shade Date: 2020-04-07 11:19:35 +0000
07-04-2020