JDK-6897789 : CDS: perm gen structure should be cleaned up
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: runtime
  • Affected Version: hs17
  • Priority: P4
  • Status: Closed
  • Resolution: Duplicate
  • OS: generic
  • CPU: generic
  • Submitted: 2009-11-03
  • Updated: 2019-01-15
  • Resolved: 2012-09-17
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Other
tbdResolved
Related Reports
Duplicate :  
JDK-6964458 - Reimplement class meta-data storage to use native memory
Relates :  
JDK-6801625 - CDS: HeapDump tests crash with internal error in compactingPermGenGen.cpp
Description
When CDS is used the perm gen has 3 spaces, yet CompactingPermGenGen derives
from OneContigSpaceCardGeneration. This uneasy and awkward class structure
can lead to bugs, as evidenced, for example, by the recent CR 6801625.
Comments
EVALUATION This was fixed with permgen elimination. The GC group can figure out if they want to clean up n_covered_regions or not, under a separate bug.
17-09-2012
EVALUATION This is fixed with permgen elimination but there's still the n_covered_regions including the shared space problem.
14-05-2012
EVALUATION Andrei, With the removal of perm gen this issue may be completely gone. Could you possibly double-check with Ramki in case there is a similar issue after you have figured out how to handle CDS without perm gen.
30-08-2010