Backports
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-2177124 | 7 | Coleen Phillimore | P3 | Closed | Fixed | b29 |
| JDK-2174905 | 6u14 | Coleen Phillimore | P3 | Resolved | Fixed | b01 |
Description
CMS doesn't work with compressed oops so it's turned off because it has these chunk headers that use the lsb of the _klass field which is not zero in the compressed oops case.
In 64 bit mode, use a bit in the markOop instead of the lsb in the _klass field to indicate free. There's apparently 25 spare bits in the markOop in 64 bit.
btw, I volunteered to do this too.
In 64 bit mode, use a bit in the markOop instead of the lsb in the _klass field to indicate free. There's apparently 25 spare bits in the markOop in 64 bit.
btw, I volunteered to do this too.
Attachments
Issue Links
- backported by
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JDK-2174905 Make CMS work with compressed oops
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- Resolved
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- Closed
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- relates to
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JDK-6689653 JMapPerm fails with UseConcMarkSweepIncGC and compressed oops off
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- Closed
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JDK-6712278 Better fix for CMS+Compressed Oops
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- Closed
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- Closed
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