JDK-8061205 : MetadataOnStackMark only needs to walk code cache during class redefinition
  • Type: Bug
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: 9
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2014-10-16
  • Updated: 2015-06-03
  • Resolved: 2015-03-13
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JDK 9
9 b57Fixed
Related Reports
Relates :  
JDK-8056240 - Investigate increased GC remark time after class unloading changes in CRM Fuse
Description
Marking all of the methods is unnecessary and may increase pause time for class unloading.
Comments
This should enable cleaning up code that mixes GC root walking with mark_on_stack code while walking the code cache.
26-01-2015
Rework purge_previous_versions so that only class redefinition walks code cache via MetadataOnStackMark and puts scratch_classes on the CLD deallocate_list once they can be unconditionally removed.
26-01-2015