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  1. JDK
  2. JDK-8241081

Shenandoah: Do not modify update-watermark concurrently

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    • gc
    • b15
    • generic
    • generic
    • Not verified

    Backports

      Description

        JDK-8240873 introduced short-cutting arraycopy-barriers on objects beyond the update-watermark. Concurrently updating the update-watermark after a region has been completely updated proves problematic: we see various different crashes related to this. Strengthening the fences around it doesn't fully solve the problem, apparently the problem is deeper. It doesn't seem worth to keep doing this for very little gain.

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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-8243601 Shenandoah: Do not modify update-watermark concurrently

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

            Enhancement - null JDK-8240873 Shenandoah: Short-cut arraycopy barriers

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

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                rkennke Roman Kennke
                rkennke Roman Kennke
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                  Created:
                  Updated:
                  Resolved: