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  1. JDK
  2. JDK-8049536

os::commit_memory on Solaris uses aligment_hint as page size

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P4 P4
    • 9
    • 9
    • hotspot
    • gc
    • b33
    • sparc
    • solaris

        os::commit_memory takes a size_t `alignment_hint` as parameter. This parameter is used differently on different operating systems: it is ignored on all operating system except for Solaris. For Solaris, the hint is used for selecting the large page size. In a special case, the hint is interpreted as the *exact* page size.

        This problem had previously been hidden because due to various alignments of heap sizes and generation sizes always made sure that we ended up with a alignment_hint of 4 MB by default, which also happens to be a valid page size.

        The bug can be triggered by running:
        java -Xms32m -Xmx128m -XX:LargePageSizeInBytes=256m -version

              ehelin Erik Helin
              ehelin Erik Helin
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