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  1. JDK
  2. JDK-8081629

CMS split_block() does not correctly fix up block-offset-table for large blocks

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Details

    • Bug
    • Resolution: Fixed
    • P4
    • 9
    • 9
    • hotspot
    • gc
    • b84

    Backports

      Description

        When a large block is split in order to allocate a chunk at the beginning of the block, split_block() should fix the block-offset-table (BOT) for the remainder of the free chunk but does not do so correctly when the remainder is large enough to use the logarithmic strides used for the BOT. split_block() fixes the start of the remainder block but may damage that fix when the fixes for the logarithmic strides is attempted.

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8141847 CMS split_block() does not correctly fix up block-offset-table for large blocks

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            duplicates

            Enhancement - null JDK-8079274 Long ParNew Pauses When Large Static Object Previously Allocated

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-6977974 CMS: blockOffsetTable.hpp:187 assert(!reducing || _offset_array[i] >= offset) failed: Not reducing

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Closed

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                jmasa Jon Masamitsu (Inactive)
                jmasa Jon Masamitsu (Inactive)
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                  Created:
                  Updated:
                  Resolved: