JDK-8261896 : Add support for multiple large page sizes for UseSHM
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 17
  • Priority: P4
  • Status: Open
  • Resolution: Unresolved
  • OS: linux
  • Submitted: 2021-02-17
  • Updated: 2022-02-21
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Unresolved : Release in which this issue/RFE will be addressed.
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Other
tbdUnresolved
Related Reports
Relates :  
JDK-8261401 - Add sanity check for UseSHM large pages similar to the one used with hugetlb large pages
Relates :  
JDK-8261894 - Remove support for UseSHM
Description
If we decide not to remove the support for UseSHM (see JDK-8261894), we should add support for using different large page sizes. Currently shmget() is only called with SHM_HUGETLB and this will always use the default large page size. For systems supporting multiple page sizes we should make use of SHM_HUGE_2MB or SHM_HUGE_1GB to allow usage of other page sizes than the default.