Integrated: Only register retired plab waste in old regions

[William Kemper]

On Wed, 29 Sep 2021 23:00:44 GMT, William Kemper <wkemper at openjdk.org> wrote:

> This is a follow up to [PR 74](https://github.com/openjdk/shenandoah/pull/74) in which we register filler objects from retired gclabs. This should _only_ be done if the plab was in an old region. Registering young objects in the remembered set confuses the verifier.

This pull request has now been integrated.

Changeset: 7fe11a23
Author:    William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.java.net/shenandoah/commit/7fe11a23d3bdde1d7fb511c5251a0413f61667a9
Stats:     1 line in 1 file changed: 0 ins; 0 del; 1 mod

Only register retired plab waste in old regions

Reviewed-by: kdnilsen

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PR: https://git.openjdk.java.net/shenandoah/pull/77