[jdk25u-dev] RFR: 8364936: Shenandoah: Switch nmethod entry barriers to conc_instruction_and_data_patch

[Aleksey Shipilev]

On Mon, 5 Jan 2026 16:30:34 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Improves Shenandoah performance on some workloads.
> 
> Additional testing:
>  - [x] Linux AArch64 server fastdebug, `hotspot_gc_shenandoah`
>  - [x] Linux AArch64 server fastdebug, `all` with `-XX:+UseShenandoahGC`

Push approval granted.

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PR Comment: https://git.openjdk.org/jdk25u-dev/pull/129#issuecomment-3727544702