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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 24
Affects Version/s: None
Component/s: hotspot
Labels:

Subcomponent:
runtime
Resolved In Build:
b19
CPU:

x86_64
OS:

windows

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8343895	23-pool	Dhamoder Nalla	P3	Open	Unresolved
JDK-8354444	21.0.8	Dhamoder Nalla	P3	Resolved	Fixed	master

OpenJDK on Windows only supports large pages <= 4MB on IA32/AMD64. See the mailing list discussion at https://mail.openjdk.org/pipermail/hotspot-runtime-dev/2023-October/065382.html for some background behind the 4MB limit. This limitation should be removed for the AMD64 architecture.

This change will be behind a new proposed JVM flag (-XX:+EnableAllLargePageSizesForWindows) that defaults to FALSE. The flag allows users to opt in to the new large page handling behavior, with a warning when the requested large page size is not a multiple of the OS minimum page size.

backported by

JDK-8343895 Hotspot should support multiple large page sizes on Windows

Open

JDK-8354444 Hotspot should support multiple large page sizes on Windows

Resolved

csr for

JDK-8339798 Hotspot should support multiple large page sizes on Windows

Closed

links to

Commit(master) openjdk/jdk21u-dev/7ef18817

Commit(master) openjdk/jdk/4ded2838

Review(master) openjdk/jdk21u-dev/1547

Review(master) openjdk/jdk23u/219

Review(master) openjdk/jdk/20758

(3 links to)

Assignee:: Dhamoder Nalla

Reporter:: Saint Wesonga

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2024-08-09 13:37

Updated:: 2025-04-11 12:21

Resolved:: 2024-10-03 21:53

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