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  1. JDK
  2. JDK-8233093

Move CDS heap oopmaps into new MetaspaceShared::bm region

    Details

    • Type: Enhancement
    • Status: Open
    • Priority: P4
    • Resolution: Unresolved
    • Affects Version/s: 14
    • Fix Version/s: tbd
    • Component/s: hotspot
    • Labels:

      Description

      After JDK-8231610 (Relocate the CDS archive if it cannot be mapped to the requested address), we will have a new "bm" region that's used only during archive loading, and will be unmapped afterwards to save memory footprint. This region will be a good place for the CDSFileMapRegion::oopmap, which is also needed only during archive loading.

      http://hg.openjdk.java.net/jdk/jdk/file/13ad9a1bac18/src/hotspot/share/include/cds.h#l53

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              • Assignee:
                Unassigned
                Reporter:
                iklam Ioi Lam
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                • Created:
                  Updated: