JDK-7005808 : G1: re-enable ReduceInitialCardMarks for G1
- Type: Enhancement
- Component: hotspot
- Sub-Component: gc
- Affected Version: 7
- Priority: P4
- Status: Closed
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2010-12-09
- Updated: 2013-09-18
- Resolved: 2012-01-23
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| JDK 7 | JDK 8 | Other |
|---|---|---|
7u4Fixed  |
8Fixed |
hs23Fixed |
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Description
ReduceInitialCardMarks created instability issues in G1 (6920109: G1: lingering instabilities with ReduceInitialCardMarks) because of a defect in G1 that allowed TLABs to be allocated into the old generation (see 6974966: G1: unnecessary direct-to-old allocations). The fix for 6974966 totally eliminated direct-to-old allocations (TLAB or non-TLAB allocations) so we should re-enable ReduceInitialCardMarks for G1 as the main issue that caused the instabilities should be been eliminated.
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