[crac] RFR: Merge jdk:jdk-27+5 [v2]

[Radim Vansa]

On Mon, 2 Feb 2026 11:10:34 GMT, Timofei Pushkin <tpushkin at openjdk.org> wrote:

> I ran a helidon-based benchmark I used for the related changes in G1 and checked that removing Universe::heap()->set_cleanup_unused(true) in crac.cpp leads to CRIU image size increasing significantly for the 3 affected GCs. For G1 I also checked that the excess GCs I was fixing by those changes do not come back (with Universe::heap()->set_cleanup_unused(true) in place).

Sounds like you tested that it does something; have you checked absolute sizes of the images before and after the change?

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PR Comment: https://git.openjdk.org/crac/pull/288#issuecomment-3835619808