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  1. JDK
  2. JDK-6948537

CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

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Details

    • Bug
    • Resolution: Fixed
    • P2
    • hs19
    • hs17, 6u19
    • hotspot
    • gc
    • 1.4.2
    • b01
    • sparc
    • solaris, solaris_10
    • Verified

    Backports

      Description

        BOT bulk-updates use memset(). However on Niagara memset() uses BIS
        for speed and this exposes concurrent readers to out-of-thin-air zeroes,
        which are fatal for concurrent BOT walks. Such concurrent reads of
        BOT entries subject to concurrent update are possible with non-contiguous
        spaces such as CMS (but not any other current GC in HotSpot).

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          Issue Links

            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-2197580 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            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-2197874 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            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-2199774 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

            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-2193020 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            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-2193339 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            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-2195904 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            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-2199484 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            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-2204491 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P3 - Major loss of function.
            • Closed

            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-2204492 CMS: BOT walkers observe out-of-thin-air zeros on sun4v sparc/CMT

            • P3 - Major loss of function.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-6872049 CMS: Failure in CompactibleFreeListSpace::block_size from ::block_start_unsafe()

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-6955836 BVF for the bug 6872049

            • P3 - Major loss of function.
            • Closed

            Bug - A problem which impairs or prevents the functions of the product. JDK-8039042 G1: Phantom zeros in cardtable

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-7192128 G1: Extend fix for 6948537 to G1's BOT

            • P3 - Major loss of function.
            • Closed

            Enhancement - null JDK-7188227 VM should recognize M-series SPARC

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

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                ysr Y. Ramakrishna
                ysr Y. Ramakrishna
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                  Created:
                  Updated:
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