RFR: 8234010: ZGC: Change ZResurrection to use Atomic::load/store
per.liden at oracle.com
Fri Nov 22 12:48:12 UTC 2019
On 11/21/19 2:24 PM, Stefan Karlsson wrote:
> Hi all,
> Please review this patch to change ZResurrection to use Atomic::load and
> Previously, ZResurrection::is_blocked() and ZResurrection::unblock()
> used loadload and storestore barriers to synchronize between the GC and
> mutator load barriers.
> JDK-8230661 changed so that we always perform a handshake before the
> ZResurrection::unblock() call.
> After that change we can rely on the handshake to perform the necessary
> synchronization, and we can change the implementation to use
> Atomic::load and Atomic::store.
> Tested with tier1-7
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